Hi, I've just had a problem related to the Date::Calc modules calculation of week numbers, as some of my data suppliers are obviously using a different algorithm to calculate week 1 of a year - they define dates which fall into week 1 of 2003 according to Date::Calc as week 53 of 2002.
I need to know the criteria for defining week 1 of a year according to Date::Calc to check which data suppliers match, and which I need to create custom week number generators for. From the documentation, I suspect it might be the week containing the 1si of January, with Monday defined as the first day of a week, but I can't find it confirmed anywhere. Does anyone know what it uses? Thanks for your help, Jon Stevenson
