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On Upsun, there are several timezones you might want to keep in mind. All timezones default to UTC time. You can customize some of them, but in most cases, it’s best if you leave them in UTC and store user data with an associated timezone instead. The different timezones on Upsun are the following:
TimezoneDescriptionCustomizable
Container timezoneThe timezone for all Upsun containers (UTC).No
App runtime timezoneSet an app runtime timezone if you want your app runtime to use a specific timezone instead of the container timezone.
The app runtime timezone only affects your app itself.		Yes
Cron timezoneSet a cron timezone if you want your crons to run in a specific timezone instead of the app runtime timezone (or instead of the container timezone if no app runtime timezone is set on your project).
The cron timezone only affects your cron jobs.		Yes
Log timezoneThe timezone for all Upsun logs (UTC).No
Each Upsun project also has a project timezone that only affects automated backups. By default, the project timezone is based on the region where your project is hosted. You can change it from the Console at any time.

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Set an app runtime timezone

How you can set an app runtime timezone depends on your actual app runtime:
Add the following to your app configuration:
.upsun/config.yaml
applications:
  # The name of the app container. Must be unique within a project.
  myapp:
    # The location of the application's code.
    variables:
      php:
        "date.timezone": "Europe/Paris"

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Set a cron timezone

You can set a specific timezone for your crons so they don’t run in your app runtime timezone (or container timezone if no app runtime timezone is set on your project). To do so, set the timezone top-level property in your app configuration.
Last modified on March 10, 2026