World Clock

What Is the World Clock?

The World Clock shows the current time in several major cities side by side, so you can check the time in another time zone without doing the arithmetic. Open the page and read the city cards. The display ticks every second, and no input is needed.

It is meant for a quick glance — scheduling a call, checking whether a shop is open, or seeing what time it is for a colleague abroad.

How to Use the World Clock

1. Open the World Clock page.
2. Read the time on each city card.
3. Reload the page if a card shows dashes instead of a time.

Worked Example

Two loads of the same page gave different results. On the first load, eight cities were shown at the same second, :05:

UTC 1:45:05 AM; New York 8:45:05 PM; London 1:45:05 AM; Paris 2:45:05 AM; Dubai 5:45:05 AM; Tokyo 9:45:05 AM; Sydney 11:45:05 AM; Los Angeles 5:45:05 PM.

Implied offsets from UTC on that load were: New York −5 hours, London 0, Paris +1, Dubai +4, Tokyo +8, Sydney +10, Los Angeles −8. On a second verification load, only six cities were shown (UTC, New York, London, Tokyo, Sydney, Dubai) and every one showed “–” instead of a time. The times therefore do not always render, and the city list varies between loads.

Limitations

• Times sometimes fail to render: on one load all six cards showed “–” and no time appeared.
• The city list varies between loads — 8 cities on one load, 6 on another, with Paris and Los Angeles missing on the second load.
• The offsets on the first load did not match the expected daylight-saving offsets for October (for example, Tokyo showed +8 instead of +9, London showed +0, and New York showed −5). Check any meeting time against a trusted clock before you rely on it.
• No date is shown, only the time, so a time near midnight can be ambiguous about which day it is in that city.
• There is no custom-city picker and no Copy or Refresh button in the observed workspace.

Frequently Asked Questions

Does the clock account for daylight saving time?

It is supposed to use the browser’s time-zone data, which includes daylight-saving rules. In the observed test the offsets still looked wrong for October, so verify important times against another source.

Can I add my own city?

No. There is no city picker in the observed workspace, and the list that appears varies between loads.

Do I need to enter anything?

No. The clock needs no input — just open the page and read the cards.

Why do some cards show dashes?

The times failed to render on one observed load, with every card showing “–”. Reloading the page is the only remedy available from the workspace.