Working with Date and Time in Flutter with jiffy

Jiffy is a Dart date time package for parsing, manipulating, querying and formatting dates.

Install the package

jiffy: ^5.0.0

Basic usage

//create Jiffy object from string or map
Jiffy("2021-03-25"); // A calendar date part
Jiffy("2021/03/25"); // A calendar date part separated by slash "/"
Jiffy("20210325"); // Basic (short) full date
Jiffy("2021-03-25 03:00:00.000"); // An hour, minute, second, and millisecond time part
Jiffy("2021-03-25T03:00:00.000"); // ISO dart format
Jiffy("2021-03-25T03:00:00.000Z"); // ISO dart format (UTC)

Jiffy({
  "hour": 19,
  "minutes": 20
});

Jiffy({
  "year": 2019,
  "month": 10,
  "day": 19,
  "hour": 19
});

Jiffy([2021]); // January 1st
Jiffy([2021, 03]); // March 1st
Jiffy([2021, 09, 18]); // September 18th

//get data
Jiffy().milliseconds;
Jiffy().seconds;
Jiffy().minute;
Jiffy().hour;
Jiffy().date;
Jiffy().daysInMonth;
Jiffy().day;
Jiffy().dayOfYear;
Jiffy().week;
Jiffy().month;
Jiffy().quarter;
Jiffy().year;

//some methods
Jiffy().add(years: 1);
Jiffy().add(months: 3, duration: Duration(days: 3));
Jiffy().subtract(days: 3);
Jiffy().startOf(Units.YEAR);
Jiffy().endOf(Units.DAY);

var jiffy1 = Jiffy("2008-10", "yyyy-MM");
var jiffy2 = Jiffy("2007-1", "yyyy-MM");
jiff1.diff(jiffy2, Units.YEAR); // 1
jiff1.diff(jiffy2, Units.YEAR, true); // 1.75

//show datetime
Jiffy().format("MMMM do yyyy, h:mm:ss a");

Show current time every 1 second

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:jiffy/jiffy.dart';

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Timer timer;
  String time = '';

  void _showTime() {
    setState(() {
      time = Jiffy().dateTime.toString();
    });
  }

  @override
  void initState() {
    super.initState();

    _showTime();
    timer = Timer.periodic(Duration(seconds: 1), (_) => _showTime());
  }

  @override
  void dispose() {
    timer?.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(

          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'Time',
              style: Theme.of(context).textTheme.headline3,
            ),

            Text(
              time,
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _showTime,
        tooltip: 'Show',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}