The documentation of LocalDateTime specifies the instance of LocalDateTime is immutable, for example plusHours public LocalDateTime plusHours(long hours) Returns a copy of this LocalDateTime with the specified number of hours added. This instance is immutable and unaffected by this method call. Parameters: hours – the hours to add, may be negative Returns: a LocalDateTime based … Read more
From here: calendar.set(Calendar.HOUR_OF_DAY, hour); calendar.set(Calendar.MINUTE, minute);
new Date(“2000-01-01 10:30 AM”).getHours() // 10 This is 24 hours: new Date(“2000-01-01 10:30 PM”).getHours() // 22 If you want a more general thing: function get_hours(time_string) { return new Date(“2000-01-01 ” + time_string).getHours() // 22 }
You could do this. adjusted_datetime = (datetime_from_form.to_time – n.hours).to_datetime
^(?:(?:([01]?\d|2[0-3]):)?([0-5]?\d):)?([0-5]?\d)$ Explanation: ^ # Start of string (?: # Try to match… (?: # Try to match… ([01]?\d|2[0-3]): # HH: )? # (optionally). ([0-5]?\d): # MM: (required) )? # (entire group optional, so either HH:MM:, MM: or nothing) ([0-5]?\d) # SS (required) $ # End of string
Date doesn’t have the hour – use datetime: from datetime import datetime, timedelta last_hour_date_time = datetime.now() – timedelta(hours = 1) print(last_hour_date_time.strftime(‘%Y-%m-%d %H:%M:%S’))
Try this: Calendar calendar = Calendar.getInstance(); calendar.setTime(yourdate); int hours = calendar.get(Calendar.HOUR_OF_DAY); int minutes = calendar.get(Calendar.MINUTE); int seconds = calendar.get(Calendar.SECOND); Edit: hours, minutes, seconds above will be the hours, minutes and seconds after converting yourdate to System Timezone!
You may use something like the strtotime() function to add something to the current timestamp. $new_time = date(“Y-m-d H:i:s”, strtotime(‘+5 hours’)). If you need variables in the function, you must use double quotes then like strtotime(“+{$hours} hours”), however better you use strtotime(sprintf(“+%d hours”, $hours)) then.
Use an NSDateFormatter to convert string1 into an NSDate, then get the required NSDateComponents: Obj-C: NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@”<your date format goes here”]; NSDate *date = [dateFormatter dateFromString:string1]; NSCalendar *calendar = [NSCalendar currentCalendar]; NSDateComponents *components = [calendar components:(NSCalendarUnitHour | NSCalendarUnitMinute) fromDate:date]; NSInteger hour = [components hour]; NSInteger minute = [components minute]; … Read more
SELECT DATEPART(HOUR, GETDATE()); DATEPART documentation