The countdown timer has been updated to provide more flexible formatting, options to control time output, and fix bugs.
Formatting now conforms to the schema for the python function
strftime() for hours, minutes, and seconds. Days are a special case handled separately.
You can view the strftime formatting documentation at https://strftime.org/
Options to hide time unites with zero for a value, and to round the last time unit up (or down) have also been added.
Edges cases and bug fixes have been addressed.
A wiki has been created to provide more maintainable documentation.
One known bug remains: The End Text source drop down may not populate correctly. Reloading the script should fix the problem.