# add method

DateTime add (Duration duration)

Returns a new DateTime instance with `duration` added to this.

    var today = new DateTime.now();
    var fiftyDaysFromNow = today.add(new Duration(days: 50));

Notice that the duration being added is actually 50 * 24 * 60 * 60 seconds. If the resulting `DateTime` has a different daylight saving offset than `this`, then the result won't have the same time-of-day as `this`, and may not even hit the calendar date 50 days later.

Be careful when working with dates in local time.

## Implementation

    external DateTime add(Duration duration);