Is .NET giving me the wrong week number for Dec. 29th 2008?

Question

According to the official (gregorian) calendar, the week number for 29/12/2008 is 1, because after the last day of week 52 (i.e. 28/12) there are three or less days left in

Answer 1

As a workaround, why not use FirstFourDayWeek but add:

  if ( weekNumber > 52 )
    weekNumber = 1;