NSDateComponents weekOfYear returns wrong value

Question

NSCalendar *calendar = [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierISO8601];
[calendar setTimeZone:[NSTimeZone defaultTimeZone]];
[calendar setFir         


        

Answer 1

Your minimumDaysInFirstWeek is 1. That means that any week that has at least 1 day in the new year is the 1st week of that year. Docs

According to ISO:

There are mutually equivalent descriptions of week 01:

the week with the year's first Thursday in it (the formal ISO definition), the week with 4 January in it, the first week with the majority (four or more) of its days in the starting year, and the week starting with the Monday in the period 29 December – 4 January.