Week 1 of 2013 starts 31-12-2012 since it's a monday. A call to <code>GetWeekOfYear</code> with culture <code>nl-NL</code>, <code>FirstDayOfWeek.Monday</code> and <code>CalendarWeekRule.FirstFourDayWeek</code> returns week number 53 for monday 31-12-2012 and week 1 for tuesday 1-1-2013. How can that monday have a different week number than tuesday? Am i missing something?

Because it's week 53 of 2012. It will return the week of the year passed in, based on the date you use (<code>31-12-2012</code>). Week 1 of 2013 is the same week as week 53 of 2012.

GetWeekOfYear returns wrong result?

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Week 1 of 2013 starts 31-12-2012 since it's a monday.

A call to GetWeekOfYear with culture nl-NL, FirstDayOfWeek.Monday and CalendarWeekRule.FirstFourDayWeek returns week number 53 for monday 31-12-2012 and week 1 for tuesday 1-1-2013. How can that monday have a different week number than tuesday?

Am i missing something?

273

asked Nov 04 '22 12:11

Jeroen

1 Answers

Because it's week 53 of 2012. It will return the week of the year passed in, based on the date you use (31-12-2012). Week 1 of 2013 is the same week as week 53 of 2012.

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