NSDateComponents example

new_gist_file

    NSDate *today = [NSDate date];
    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    [gregorian setLocale:[NSLocale currentLocale]];
    
    NSDateComponents *nowComponents = [gregorian components:NSYearCalendarUnit | NSWeekCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit fromDate:today];
    
    [nowComponents setWeekday:2]; //Monday
    [nowComponents setHour:0]; //1 a.m.
    [nowComponents setMinute:0];
    [nowComponents setSecond:0];
    
    return [gregorian dateFromComponents:nowComponents];