Subject Re: [ib-support] SP to extract a week number
Author Svein Erling Tysvær
>I believe I heard somewhere that the ISO standard for numbering weeks of
>the year calls for week 1 to be the first week of the year which contains a

Sounds correct. At least Thursday 1 January 1998 was part of week 1,
whereas Friday 1 January 1999 was in week 53 (using tMonthCalendar).