diff --git a/examples/Makefile b/examples/Makefile
index 958723f3..76c7963b 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -2,7 +2,7 @@
 #
 # Makefile for libxlsxwriter examples.
 #
-# Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+# Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
 #
 
 # Keep the output quiet by default.
diff --git a/examples/anatomy.c b/examples/anatomy.c
index b8ed0a27..06a41434 100644
--- a/examples/anatomy.c
+++ b/examples/anatomy.c
@@ -1,7 +1,7 @@
 /*
  * Anatomy of a simple libxlsxwriter program.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/array_formula.c b/examples/array_formula.c
index 50827da3..981cca49 100644
--- a/examples/array_formula.c
+++ b/examples/array_formula.c
@@ -2,7 +2,7 @@
  * Example of how to use the libxlsxwriter library to write simple
  * array formulas.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/autofilter.c b/examples/autofilter.c
index 98e65687..785bdb03 100644
--- a/examples/autofilter.c
+++ b/examples/autofilter.c
@@ -2,7 +2,7 @@
  * Example of adding an autofilter to a worksheet in Excel using
  * libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/background.c b/examples/background.c
index b3ee8dcb..1826c2e0 100644
--- a/examples/background.c
+++ b/examples/background.c
@@ -1,7 +1,7 @@
 /*
  * An example of setting a worksheet background image with libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart.c b/examples/chart.c
index 615afa66..010f185d 100644
--- a/examples/chart.c
+++ b/examples/chart.c
@@ -1,7 +1,7 @@
 /*
  * An example of a simple Excel chart using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_area.c b/examples/chart_area.c
index f7d1cc4c..eda61945 100644
--- a/examples/chart_area.c
+++ b/examples/chart_area.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating Excel area charts using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_bar.c b/examples/chart_bar.c
index ca881663..0ad686d1 100644
--- a/examples/chart_bar.c
+++ b/examples/chart_bar.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating Excel bar charts using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_clustered.c b/examples/chart_clustered.c
index cf98fef8..871b4c86 100644
--- a/examples/chart_clustered.c
+++ b/examples/chart_clustered.c
@@ -1,7 +1,7 @@
 /*
  * An example of a clustered category chart using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_column.c b/examples/chart_column.c
index 18e5379a..dd309fcf 100644
--- a/examples/chart_column.c
+++ b/examples/chart_column.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating Excel column charts using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_data_labels.c b/examples/chart_data_labels.c
index 1a9a563e..7d69fa6b 100644
--- a/examples/chart_data_labels.c
+++ b/examples/chart_data_labels.c
@@ -2,7 +2,7 @@
  * A demo of an various Excel chart data label features that are available via
  * a libxlsxwriter chart.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_data_table.c b/examples/chart_data_table.c
index b3a46dab..7979394f 100644
--- a/examples/chart_data_table.c
+++ b/examples/chart_data_table.c
@@ -2,7 +2,7 @@
  * An example of creating Excel column charts with data tables using the
  * libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_data_tools.c b/examples/chart_data_tools.c
index 4287f10f..55dee5e9 100644
--- a/examples/chart_data_tools.c
+++ b/examples/chart_data_tools.c
@@ -4,7 +4,7 @@
  *
  * These include Drop Lines and High-Low Lines.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_doughnut.c b/examples/chart_doughnut.c
index fa0dca01..776526fd 100644
--- a/examples/chart_doughnut.c
+++ b/examples/chart_doughnut.c
@@ -7,7 +7,7 @@
  * each segment is represented as a point so it is necessary to assign
  * formatting to each point in the series.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_fonts.c b/examples/chart_fonts.c
index c8c652b3..6e687b5c 100644
--- a/examples/chart_fonts.c
+++ b/examples/chart_fonts.c
@@ -2,7 +2,7 @@
  * An example of a simple Excel chart with user defined fonts using the
  * libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_line.c b/examples/chart_line.c
index dfce5529..58386508 100644
--- a/examples/chart_line.c
+++ b/examples/chart_line.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating an Excel line chart using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_pattern.c b/examples/chart_pattern.c
index 679438d9..62d488c8 100644
--- a/examples/chart_pattern.c
+++ b/examples/chart_pattern.c
@@ -2,7 +2,7 @@
  * An example of a simple Excel chart with patterns using the libxlsxwriter
  * library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_pie.c b/examples/chart_pie.c
index 3710f3d6..98443e3a 100644
--- a/examples/chart_pie.c
+++ b/examples/chart_pie.c
@@ -7,7 +7,7 @@
  * each segment is represented as a point so it is necessary to assign
  * formatting to each point in the series.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_pie_colors.c b/examples/chart_pie_colors.c
index 135c2e26..6a70d9bb 100644
--- a/examples/chart_pie_colors.c
+++ b/examples/chart_pie_colors.c
@@ -7,7 +7,7 @@
  * particular this is required for Pie/Doughnut charts where each segment is
  * represented by a point.
 
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_radar.c b/examples/chart_radar.c
index b2921627..852329ce 100644
--- a/examples/chart_radar.c
+++ b/examples/chart_radar.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating Excel radar charts using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_scatter.c b/examples/chart_scatter.c
index 944b2447..812218e2 100644
--- a/examples/chart_scatter.c
+++ b/examples/chart_scatter.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating Excel scatter charts using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_styles.c b/examples/chart_styles.c
index 98a77412..e4d28583 100644
--- a/examples/chart_styles.c
+++ b/examples/chart_styles.c
@@ -3,7 +3,7 @@
  * using the libxlsxwriter library. Note, these styles are not the same as the
  * styles available in Excel 2013.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chart_working_with_example.c b/examples/chart_working_with_example.c
index b037640b..9ccf4907 100644
--- a/examples/chart_working_with_example.c
+++ b/examples/chart_working_with_example.c
@@ -2,7 +2,7 @@
  * An example of a simple Excel chart using the libxlsxwriter library. This
  * example is used in the "Working with Charts" section of the docs.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/chartsheet.c b/examples/chartsheet.c
index b426d5b5..63927c9e 100644
--- a/examples/chartsheet.c
+++ b/examples/chartsheet.c
@@ -1,7 +1,7 @@
 /*
  * An example of creating an Excel chartsheet using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/comments1.c b/examples/comments1.c
index f42699ec..98d0abcf 100644
--- a/examples/comments1.c
+++ b/examples/comments1.c
@@ -1,7 +1,7 @@
 /*
  * An example of writing cell comments to a worksheet using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/comments2.c b/examples/comments2.c
index 4e1a2a17..81e02d75 100644
--- a/examples/comments2.c
+++ b/examples/comments2.c
@@ -3,7 +3,7 @@
  *
  * Each of the worksheets demonstrates different features of cell comments.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/conditional_format1.c b/examples/conditional_format1.c
index 5b9c5029..069d74cd 100644
--- a/examples/conditional_format1.c
+++ b/examples/conditional_format1.c
@@ -4,7 +4,7 @@
  *
  * See conditional_format.c for a more comprehensive example.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/conditional_format2.c b/examples/conditional_format2.c
index d3c47f18..04003b03 100644
--- a/examples/conditional_format2.c
+++ b/examples/conditional_format2.c
@@ -4,7 +4,7 @@
  * Conditional formatting allows you to apply a format to a cell or a
  * range of cells based on certain criteria.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/constant_memory.c b/examples/constant_memory.c
index f3db84d6..ee24e74f 100644
--- a/examples/constant_memory.c
+++ b/examples/constant_memory.c
@@ -2,7 +2,7 @@
  * Example of using libxlsxwriter for writing large files in constant memory
  * mode.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/data_validate.c b/examples/data_validate.c
index 98b48e5d..ed2c5ecc 100644
--- a/examples/data_validate.c
+++ b/examples/data_validate.c
@@ -6,7 +6,7 @@
  * that a user enters in a cell and to display help and warning messages. It
  * also allows you to restrict input to values in a dropdown list.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  */
 
 
diff --git a/examples/dates_and_times01.c b/examples/dates_and_times01.c
index 8070be8c..467c42b8 100644
--- a/examples/dates_and_times01.c
+++ b/examples/dates_and_times01.c
@@ -6,7 +6,7 @@
  * An easier approach using a lxw_datetime struct is shown in example
  * dates_and_times02.c.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/dates_and_times02.c b/examples/dates_and_times02.c
index d8276443..6c5bd96d 100644
--- a/examples/dates_and_times02.c
+++ b/examples/dates_and_times02.c
@@ -2,7 +2,7 @@
  * Example of writing dates and times in Excel using an lxw_datetime struct
  * and date formatting.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/dates_and_times03.c b/examples/dates_and_times03.c
index 429c72f6..e35ec0e4 100644
--- a/examples/dates_and_times03.c
+++ b/examples/dates_and_times03.c
@@ -2,7 +2,7 @@
  * Example of writing dates and times in Excel using a Unix datetime and date
  * formatting.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/dates_and_times04.c b/examples/dates_and_times04.c
index 5a2a3f6d..f4653de6 100644
--- a/examples/dates_and_times04.c
+++ b/examples/dates_and_times04.c
@@ -1,7 +1,7 @@
 /*
  * Example of writing dates and times in Excel using different date formats.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/defined_name.c b/examples/defined_name.c
index 117da137..9b519a6a 100644
--- a/examples/defined_name.c
+++ b/examples/defined_name.c
@@ -3,7 +3,7 @@
  * used to define a user friendly name to represent a value, a single cell or
  * a range of cells in a workbook.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/demo.c b/examples/demo.c
index 683b12b2..1f15335b 100644
--- a/examples/demo.c
+++ b/examples/demo.c
@@ -1,7 +1,7 @@
 /*
  * A simple example of some of the features of the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/diagonal_border.c b/examples/diagonal_border.c
index d111ddaa..0f04a13f 100644
--- a/examples/diagonal_border.c
+++ b/examples/diagonal_border.c
@@ -2,7 +2,7 @@
  * A simple formatting example that demonstrates how to add diagonal
  * cell borders using the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/doc_custom_properties.c b/examples/doc_custom_properties.c
index 3a6ea3a7..3f1373ac 100644
--- a/examples/doc_custom_properties.c
+++ b/examples/doc_custom_properties.c
@@ -2,7 +2,7 @@
  * Example of setting custom document properties for an Excel spreadsheet
  * using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/doc_properties.c b/examples/doc_properties.c
index cdab3886..34561762 100644
--- a/examples/doc_properties.c
+++ b/examples/doc_properties.c
@@ -2,7 +2,7 @@
  * Example of setting document properties such as Author, Title, etc., for an
  * Excel spreadsheet using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/dynamic_arrays.c b/examples/dynamic_arrays.c
index 54bc4971..916e7cbb 100644
--- a/examples/dynamic_arrays.c
+++ b/examples/dynamic_arrays.c
@@ -3,7 +3,7 @@
  * dynamic arrays. These functions are new to Excel 365. The examples mirror
  * the examples in the Excel documentation on these functions.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/format_font.c b/examples/format_font.c
index 3941cfa7..8ae0b677 100644
--- a/examples/format_font.c
+++ b/examples/format_font.c
@@ -2,7 +2,7 @@
  * Example of writing some data with font formatting to a simple Excel
  * file using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/format_num_format.c b/examples/format_num_format.c
index fa57eb82..ef9a5ff2 100644
--- a/examples/format_num_format.c
+++ b/examples/format_num_format.c
@@ -2,7 +2,7 @@
  * Example of writing some data with numeric formatting to a simple Excel file
  * using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/headers_footers.c b/examples/headers_footers.c
index 9a96c82e..975a76f6 100644
--- a/examples/headers_footers.c
+++ b/examples/headers_footers.c
@@ -30,7 +30,7 @@
  *
  *     &&                  Miscellaneous       Literal ampersand &
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/hello.c b/examples/hello.c
index cbb387db..08202de7 100644
--- a/examples/hello.c
+++ b/examples/hello.c
@@ -1,7 +1,7 @@
 /*
  * Example of writing some data to a simple Excel file using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/hide_row_col.c b/examples/hide_row_col.c
index 13d6786a..afee3de9 100644
--- a/examples/hide_row_col.c
+++ b/examples/hide_row_col.c
@@ -7,7 +7,7 @@
  * Libxlsxwriter we replicate that using the worksheet_set_default_row()
  * function.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/hide_sheet.c b/examples/hide_sheet.c
index c2aefc35..74e30000 100644
--- a/examples/hide_sheet.c
+++ b/examples/hide_sheet.c
@@ -1,7 +1,7 @@
 /*
  * Example of how to hide a worksheet using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/hyperlinks.c b/examples/hyperlinks.c
index a66d53a3..a8566e1d 100644
--- a/examples/hyperlinks.c
+++ b/examples/hyperlinks.c
@@ -1,7 +1,7 @@
 /*
  * Example of writing urls/hyperlinks with the libxlsxwriter library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/ignore_errors.c b/examples/ignore_errors.c
index 78e80d61..60e3ecbb 100644
--- a/examples/ignore_errors.c
+++ b/examples/ignore_errors.c
@@ -2,7 +2,7 @@
  * An example of turning off worksheet cells errors/warnings using
  * libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/image_buffer.c b/examples/image_buffer.c
index 1aa5d15d..3e43aa32 100644
--- a/examples/image_buffer.c
+++ b/examples/image_buffer.c
@@ -2,7 +2,7 @@
  * An example of inserting an image from a memory buffer into a worksheet
  * using the libxlsxwriter library.
  *
- * Copyright 2014-2021 John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024 John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/images.c b/examples/images.c
index 607db3fc..b7413162 100644
--- a/examples/images.c
+++ b/examples/images.c
@@ -2,7 +2,7 @@
  * An example of inserting images into a worksheet using the libxlsxwriter
  * library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/lambda.c b/examples/lambda.c
index 0ad29f79..f0468f88 100644
--- a/examples/lambda.c
+++ b/examples/lambda.c
@@ -2,7 +2,7 @@
  * An example of using the new Excel LAMBDA() function with the libxlsxwriter
  * library.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/macro.c b/examples/macro.c
index bdb9973b..49995dba 100644
--- a/examples/macro.c
+++ b/examples/macro.c
@@ -10,7 +10,7 @@
  * supported by libxlsxwriter) but that isn't a requirement for adding a macro
  * file to the workbook.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  */
 
 #include "xlsxwriter.h"
diff --git a/examples/merge_range.c b/examples/merge_range.c
index add4851b..97cd1ffd 100644
--- a/examples/merge_range.c
+++ b/examples/merge_range.c
@@ -1,7 +1,7 @@
 /*
  * An example of merging cells using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/merge_rich_string.c b/examples/merge_rich_string.c
index 83ff0651..18a9f551 100644
--- a/examples/merge_rich_string.c
+++ b/examples/merge_rich_string.c
@@ -1,7 +1,7 @@
 /*
  * An example of merging cells containing a rich string using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/outline.c b/examples/outline.c
index 83eedf71..ba4a5815 100644
--- a/examples/outline.c
+++ b/examples/outline.c
@@ -8,7 +8,7 @@
  * Outlines can reduce complex data down to a few salient sub-totals or
  * summaries.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/outline_collapsed.c b/examples/outline_collapsed.c
index c95d9f32..6c777cac 100644
--- a/examples/outline_collapsed.c
+++ b/examples/outline_collapsed.c
@@ -4,7 +4,7 @@
  * These examples focus mainly on collapsed outlines. See also the outlines.c
  * example program for more general examples.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/output_buffer.c b/examples/output_buffer.c
index 142196cc..ed39da33 100644
--- a/examples/output_buffer.c
+++ b/examples/output_buffer.c
@@ -1,7 +1,7 @@
 /*
  * Example of using libxlsxwriter to write a workbook file to a memory buffer.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/panes.c b/examples/panes.c
index da78fae6..6fcf825e 100644
--- a/examples/panes.c
+++ b/examples/panes.c
@@ -2,7 +2,7 @@
  * A simple example using the libxlsxwriter library to create worksheets with
  * panes.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/rich_strings.c b/examples/rich_strings.c
index 9b8f0106..b7137eb9 100644
--- a/examples/rich_strings.c
+++ b/examples/rich_strings.c
@@ -2,7 +2,7 @@
  * An example of using the libxlsxwriter library to write some "rich strings",
  * i.e., strings with multiple formats.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/tab_colors.c b/examples/tab_colors.c
index 0db728ed..b4030f49 100644
--- a/examples/tab_colors.c
+++ b/examples/tab_colors.c
@@ -1,7 +1,7 @@
 /*
  * Example of how to set Excel worksheet tab colors using libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/tables.c b/examples/tables.c
index ee910d35..458cd41c 100644
--- a/examples/tables.c
+++ b/examples/tables.c
@@ -4,7 +4,7 @@
  * Conditional formatting allows you to apply a format to a cell or a
  * range of cells based on certain criteria.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/tutorial1.c b/examples/tutorial1.c
index 080e7486..e24e999b 100644
--- a/examples/tutorial1.c
+++ b/examples/tutorial1.c
@@ -5,7 +5,7 @@
  * This program is shown, with explanations, in Tutorial 1 of the
  * libxlsxwriter documentation.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/tutorial2.c b/examples/tutorial2.c
index 89d6a09b..f90b4389 100644
--- a/examples/tutorial2.c
+++ b/examples/tutorial2.c
@@ -5,7 +5,7 @@
  * This program is shown, with explanations, in Tutorial 2 of the
  * libxlsxwriter documentation.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/tutorial3.c b/examples/tutorial3.c
index e570dee4..eee3ed12 100644
--- a/examples/tutorial3.c
+++ b/examples/tutorial3.c
@@ -5,7 +5,7 @@
  * This program is shown, with explanations, in Tutorial 3 of the
  * libxlsxwriter documentation.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/utf8.c b/examples/utf8.c
index 365efefd..a097baa7 100644
--- a/examples/utf8.c
+++ b/examples/utf8.c
@@ -3,7 +3,7 @@
  *
  * Note: The source file must be UTF-8 encoded.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/watermark.c b/examples/watermark.c
index 980307c6..860ea00d 100644
--- a/examples/watermark.c
+++ b/examples/watermark.c
@@ -4,7 +4,7 @@
  * suggested in the Microsoft documentation:
  * https://support.microsoft.com/en-us/office/add-a-watermark-in-excel-a372182a-d733-484e-825c-18ddf3edf009
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/examples/worksheet_protection.c b/examples/worksheet_protection.c
index 63ea1485..9d1edcbd 100644
--- a/examples/worksheet_protection.c
+++ b/examples/worksheet_protection.c
@@ -2,7 +2,7 @@
  * Example of cell locking and formula hiding in an Excel worksheet using
  * libxlsxwriter.
  *
- * Copyright 2014-2021, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/test/functional/src/test_chart_format32.c b/test/functional/src/test_chart_format32.c
index e3b2d2fa..db7e858b 100644
--- a/test/functional/src/test_chart_format32.c
+++ b/test/functional/src/test_chart_format32.c
@@ -3,7 +3,7 @@
  *
  * Test to compare output against Excel files.
  *
- * Copyright 2014-2023, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/test/functional/src/test_format18.c b/test/functional/src/test_format18.c
index 079541e5..a543fdff 100644
--- a/test/functional/src/test_format18.c
+++ b/test/functional/src/test_format18.c
@@ -3,7 +3,7 @@
  *
  * Test to compare output against Excel files.
  *
- * Copyright 2014-2023, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/test/functional/src/test_image58.c b/test/functional/src/test_image58.c
index 6ec007de..d864ba35 100644
--- a/test/functional/src/test_image58.c
+++ b/test/functional/src/test_image58.c
@@ -3,7 +3,7 @@
  *
  * Test to compare output against Excel files.
  *
- * Copyright 2014-2023, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/test/functional/src/test_table29.c b/test/functional/src/test_table29.c
index df7f3486..70404762 100644
--- a/test/functional/src/test_table29.c
+++ b/test/functional/src/test_table29.c
@@ -3,7 +3,7 @@
  *
  * Test to compare output against Excel files.
  *
- * Copyright 2014-2023, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/test/functional/src/test_table30.c b/test/functional/src/test_table30.c
index a6a740f3..4cf32928 100644
--- a/test/functional/src/test_table30.c
+++ b/test/functional/src/test_table30.c
@@ -3,7 +3,7 @@
  *
  * Test to compare output against Excel files.
  *
- * Copyright 2014-2023, John McNamara, jmcnamara@cpan.org
+ * Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
  *
  */
 
diff --git a/test/unit/table/Makefile b/test/unit/table/Makefile
index 2c05b8e2..481f476e 100644
--- a/test/unit/table/Makefile
+++ b/test/unit/table/Makefile
@@ -2,7 +2,7 @@
 #
 # Makefile for libxlsxwriter library.
 #
-# Copyright 2014-2015, John McNamara, jmcnamara@cpan.org
+# Copyright 2014-2024, John McNamara, jmcnamara@cpan.org
 #
 
 include ../Makefile.unit