Question

I need help on how to find out how many days it has been (seven day weeks, MSTimezone) since May 6th, 2009

[NSDate *m62009 = [NSDate dateWithTimeIntervalSinceReferenceDate:231638400];
[m62009 setTimeZone:[NSTimeZone timeZoneWithAbbreviation:@"MST"]; (to help you – 231638400 seconds from 1/1/2001)

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Edit:
And then how can I convert the NSTimeInterval into days as an integer or string

Answer 1

This has been covered here, but the solution you’re looking for should be something like the following:

NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:@"yyyy-MM-dd"];

NSDate *date1 = [dateFormatter dateFromString:@"2009-05-06"];
NSDate *date2 = [NSDate date]; // Should produce today's date

NSTimeInterval diff = [date2 timeIntervalSinceDate:date1]

You can then format the NSTimeInterval as you see fit.