- (BOOL)isNowAGoodTimeForADrink {
    NSDate *now = [NSDate date];
    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    NSDateComponents *components = [gregorian components:NSCalendarUnitWeekday|NSCalendarUnitHour fromDate:now];
    
    BOOL isWeekend = components.weekday == 7 || components.weekday == 0; // sat or sun

    // it is a good time for a drink on weekends after 11am and weekdays after 5pm
    return (isWeekend && components.hour >= 11) || (!isWeekend && components.hour >= 17);
}