Yes... mine work (see earlier in the thread)

print dbo.fnISOYearWeek('Aug 31 2008')

Gives 200835 😀

Incidentally the routine posted by rkintrup fails for me every few years:

Can't test Tomasz's routine as if fails on my installation (British dates). I'd be interested to know if...

Hi,

The ISO Week problem arised last year for us. I programmed, tested and benchmarked a set of various conversion routines. Speed was essential in my case.

Above routine: 1360ms for...