Default

The default timezone is UTC.

Advantages

The advantages of using UTC as your one true time zone include

1. No more need to Google other time zones. You immediately know the difference between where you stand to UTC, and that's it.
2. Not affected by Daylight Saving Time. This advantage speaks for itself.
3. No more need to ask people where they are. You can focus on finding availability quickly and easily.
4. You can add it to your calendar by default or use it as a secondary time. Most calendar solutions support this.

Google Calendar

You can configure your Google Calendar to see both your locale timezone and UTC Timezone.

Meetings

We use Central European Time (CET) for all our meeting timezone.

Advantages

This is so that the DST change impacts the least possible amount of people. As of today, October 2022, 68% of the team observes a daylight saving change, and the shift is synched with CET for 60% of the people. We track this number with:

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We will update the meeting timezone based on how many people observe a daylight saving change. For example, the US removing the DST change will have an impact.

https://www.worlddata.info/timezones/daylightsavingtimes.php