Tips for adjusting the timezone offset for upcoming dates affected by Daylight Saving Time

I have an upcoming event scheduled for 02-May-2021 at 1:30 PM in Central Daylight Time. However, I am scheduling it today on 25-FEB-2021 in Central Standard Time and noticing that the time shifts to 12:30 PM.

Is there a solution to prevent this shift? My application is built in AngularJS and utilizes Bootstrap-angular Datetime picker.

Answer №1

If you need to handle timezones in your code, consider using moment-timezone library available at this link. You can adjust the date offset based on the timezone, such as adding +01:00 for France.

<script type="text/javascript" src="./moment-timezone-with-data.js"></script>

let offsetFrance = moment().tz("Europe/Paris").format('Z'); //+01:00
let eventWithOffset = moment().format('YYYY-MM-DDTHH:mm:ss[' + offsetFrance + ']');
let eventGmt = moment.tz(eventWithOffset, 'Europe/Paris').toISOString();

Alternatively, for AngularJS apps, you can use moment library by following these steps:

Link to angular-momentjs script

Include the script in your project:

<script type="text/javascript" src="./angular-momentjs.js"></script>

Inject the dependency in your app module and controller:

var app = angular.module('myApp', ['angular-momentjs']);

app.controller('myCtrl', function($scope, $moment) {
  let now = $moment().toISOString();
  let myEvent = $moment('02/05/2021 13:30', 'DD/MM/YYYY HH:mm').toISOString();

  if($moment(now).isAfter(myEvent)) alert('Time to event');
  else alert('ok');
});

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