Date.getWeek()

[MalacTheLittle]

Add getWeek method to Date Class that will return ISO8601 based week number.

Example of other programing languages: https://www.epochconverter.com/weeknumbers

[ajwfrost]

Sounds like a good idea ...
Copying the ISO-8601 description here:

Week number according to the ISO-8601 standard, weeks starting on Monday. The first week of the year is the week that contains that year's first Thursday (='First 4-day week').