Show additional time zones in Google Calendar and Outlook
Extra time-zone rulers let you read one meeting slot in several cities without editing the meeting. Google documents a primary, secondary and tertiary zone. Outlook controls differ by version; do not apply the classic Outlook limit to every Outlook client.
January 15, 2026: one row read in three cities
| Los Angeles | New York | London | UTC |
|---|---|---|---|
| 06:00 | 09:00 | 14:00 | 14:00Z |
| 08:00–10:00 | 11:00–13:00 | 16:00–18:00 | 16:00–18:00Z |
| 14:00 | 17:00 | 22:00 | 22:00Z |
Google Calendar: additional rulers or the world clock
On a computer, open Settings, then General and Time zone. Google documents Show additional time zones, a Secondary time zone and an optional Tertiary time zone. Return to an hourly calendar view and inspect the parallel labels.
For other cities, General > World clock offers Show world clock and Add time zone. This is a sidebar clock, a different display from an extra calendar ruler.
Outlook: identify the client before following its menus
In new Outlook and Outlook on the web, Microsoft documents Settings > Calendar > View, then Add time zone. Choose the city under Other time zones, optionally give it a label, enable Show in calendar and save. Move up and Move down reorder the additional zones. The cited page does not establish a maximum of three for these clients; its web instructions explicitly discuss three or more.
For classic Outlook, use File > Options > Calendar > Time zones. Microsoft says the latest Outlook for Microsoft 365 supports up to three zones; other classic versions, including Outlook 2019 LTSC and Outlook 2016, support two. Use the second/third-zone checkboxes actually available in that version.
Microsoft says the second zone is visible in day or week view. If a label disappears in another view, return to Day or Week before changing event data.
Worked winter check: three offices, one instant
For this author-calculated example, use January 15, 2026 and 08:00 in Los Angeles. That is 16:00 UTC, 11:00 in New York and 16:00 in London. All three labels describe one instant.
With illustrative working hours of 08:00–18:00 in each city, the shared interval is 08:00–10:00 Los Angeles, 11:00–13:00 New York and 16:00–18:00 London: two hours. This is a calculation for the stated date and hours, not a measurement of anyone’s availability.
Verify a ruler without moving a meeting
Record one harmless event’s date and start, add the display columns, and compare that same event. Adding a secondary display label is different from changing the event’s own time zone.
Changing the primary display zone can move where events appear on your grid; verify the saved event instant rather than assuming a different visible hour means the meeting was rescheduled.
What it looks like
Cloud Calendars overview, using our product images. Provider settings and protocol examples described in this guide are separate from the screens shown here.
What to do
- Identify the Outlook client and version.
- Use named city zones and short, meaningful labels.
- Return to an hourly Day or Week view to inspect additional rulers.
- Compare a known event before editing any meeting.
Questions
- Does new Outlook have the same three-zone limit as classic Outlook?
- The cited Microsoft page gives a three-zone limit for the latest classic Outlook for Microsoft 365, not a universal cap for new Outlook or web. Use the controls in your current client.
- Does adding a second ruler change a saved meeting?
- It adds another way to read the same instant. Changing an event’s own time zone is a separate edit.