subtract method - DateTime class - dart:core library (original) (raw)

DateTime subtract(

1. Duration duration )

Returns a new DateTime instance with duration subtracted from thisDateTime.

final today = DateTime.now();
final fiftyDaysAgo = today.subtract(const Duration(days: 50));

Notice that the duration being subtracted 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 earlier.

Be careful when working with dates in local time.

Implementation

external DateTime subtract(Duration duration);