Get Last Month Date In Flutter / Dart

Question

in flutter we can get current month using this

var now = new DateTime.now();
var formatter = new DateFormat(\'MM\');
String month = formatter.format(now);
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Answer 1

You can just use

var prevMonth = new DateTime(date.year, date.month - 1, date.day);

with

var date = new DateTime(2018, 1, 13);

you get

2017-12-13

It's usually a good idea to convert to UTC and then back to local date/time before doing date calculations to avoid issues with daylight saving and time zones.