Daylight saving time guide

DST meeting planner checklist

Daylight saving time creates the most common one-hour mistake in global scheduling. Use this checklist before sending a recurring invite.

Quick answer

Always include the dateOffset changes are date-specific, so “9 AM PST” is not enough.
Check both citiesSome cities change DST, some do not, and some change on different dates.
Prefer IANA zonesAmerica/New_York and Europe/London are more reliable than EST or GMT alone.

How to use this in a meeting invite

When scheduling across countries, write the city timezone and the date, then share a date-aware planner link. Abbreviations such as EST, PDT, GMT, BST, CET, and CEST are useful search terms, but they are not as reliable as IANA zones like America/New_York or Europe/London.

MeetAcross calculates times in the browser with the built-in Intl timezone database, so daylight-saving transitions are handled without a paid API.

FAQ

Which teams are most affected by DST?

US–Europe, US–Australia, and Europe–Asia teams often see temporary offset changes.

Do all countries use daylight saving time?

No. Many locations, including Japan, South Korea, India, Singapore and most of Arizona, do not use DST.

How should recurring meetings be checked?

Review them before the spring and fall DST transitions in each region.

Related DST guides