Time Zone and DST Tools & Articles

Time Zones

Time Zone Map

World map of time zones, accounting for all DST changes in real time.

Time Zone Converter

Calculate the time difference between places and time zones.

Meeting Planner

Find the best time to have a meeting across time zones.

Event Time Announcer

Calculate and share global times for your event.

Time Zone Abbreviations

All of the world’s time zones and their names.

Time Zones

What is a time zone, and how does it work?

Read more about time zones

Daylight Saving Time

Daylight Saving Time 2023

All countries using DST across the globe this year.

Upcoming DST Changes

Which countries will change their clocks in the coming weeks?

History of DST

Why do we have Daylight Saving Time and who invented it?

DST in Europe

The EU is intent on scrapping DST. But the decision is stalling.

Daylight Saving Time

What is DST and when do the clocks go back?

Read more about DST

Current Time

Monday
Dec 4, 2023
Washington DC, District of Columbia, USA

Set home location

World Clock

World Clock

Find the local times in capitals and big cities across the globe.

Personal World Clock

Set the current time of your favorite locations across time zones.

What Is UTC?

UTC is the world’s time standard for all time zones.

What Is AM and PM?

Is noon 12 pm and midnight 12 am?

Read more about timekeeping

Holidays & Events

05DEC
Why Is the December 5 Half Moon Special?
Tuesday, December 5, 2023
We often refer to a Quarter Moon as a Half Moon, and say it is 50% illuminated. But this is not completely true. The Third Quarter Moon on December 5 will be 50.137% lit up—the most illuminated Quarter Moon of the year. Full Story
06DEC
St Nicholas Day in the United States
Wednesday, December 6, 2023
St Nicholas' Day is an observance of European origin that is celebrated in some American communities on December 6. Full Story
Go to Holidays Worldwide
Time Zone Clarity in Greenland
Most of Greenland did not put the clocks back by one hour on October 29, 2023, for Daylight Saving Time (DST). Full Story
Go to Time Zone News
Issue #128:
- DST ends in Europe in the early hours of Sunday, October 29
- In the US and Canada, DST ends one week later
- Plus, how to help your toddler through the time change
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