**Format Codes**in the documentation for

*Time Measure*, lists:

%w: Weekday as number with Sunday as first day of week. (0 - 6), and

%u: ISO 8601 weekday as number with Monday as first day of week. (1 - 7).

'w' for Sunday; 'u' for Monday.

But it also lists:

%U: Week of year number, with the first Sunday as first day of week one. (00 - 53), and

%W: Week of year as number, with first Monday as first day of week one. (00 - 53).

'U' for Sunday; 'W' for Monday.

Perhaps this is intentional? Or perhaps an error, as logically one would expect the designator for week-number based on a specific weekday, to match the designator for that weekday, differing in case only; rather than alternating; i.e. wouldn't it make more sense to use 'W' for week-number/Sunday-origin, to match 'w' for weekday/Sunday-origin?

In addition, I note that today, both return "11", while the ISO week number as reported by Wikipedia is "12", as also returned by the

*Time Measure*'s 'V' format code. I'm curious as to the discrepancy. Yes, 'V' is origin "1", while 'W' and 'U' are origin "0", but both extend to "53", i.e. 'U' and 'W' allow for one more week than does 'V'.