fn.dayFromDateTime( $arg as Date? ) as Number?
Returns an xs:integer between 1 and 31, both inclusive, representing the day component in the localized value of $arg.
If $arg is the empty sequence, returns the empty sequence.
|$arg||The dateTime whose day component will be returned.|
fn.dayFromDateTime(xs.dateTime("1999-05-31T13:20:00-05:00")); => 31
fn.dayFromDateTime( xs.dateTime("1999-12-31T20:00:00-05:00")); => 31
fn.dayFromDateTime( fn.adjustDateTimeToTimezone( xs.dateTime("1999-12-31T19:20:00-03:00"), xs.dayTimeDuration("PT0H"))); => 1