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Time zones

flutter_date_formatter formats the DateTime value it receives. It does not ship a time-zone database or convert an instant between named zones.

Local values​

Most DateTime constructors create local values. Formatting preserves that local wall-clock value:

final local = DateTime(2025, 3, 21, 15, 30);
local.format(pattern: 'yyyy-MM-dd HH:mm'); // local clock time

UTC values​

Use toUtc() or parse with utc: true when the input represents UTC:

final parsed = FlutterDateFormatter('yyyy-MM-dd HH:mm:ss')
    .parse('2025-03-21 15:30:00', utc: true);

assert(parsed.isUtc);

The utc option controls the DateTime returned by parsing; it does not apply a named-zone conversion. For IANA zones such as Asia/Ho_Chi_Minh, convert the value with a dedicated timezone package before passing it to the formatter.