Clock Around

It's noon here — but what time is it there, and when is everyone awake at once?

How to play

Given a time in one city, work out the matching local time in each other city's timezone and type it in. Then solve the twist: find the one hour that falls within daytime for every city at once.

• Enter each city's local time in HH:MM based on its zone offset
• Account for which cities are ahead of or behind the reference
• Pinpoint the hour that's daytime across all of them
• A hint is available, and difficulty adds more cities and zones

Game modes

• Easy or Medium difficulty for fewer or more cities
• Daily puzzle or Practice for unlimited rounds

Controls

• Desktop: type times into the HH:MM fields and click Submit
• Phone & tablet: tap fields (numeric keypad) and tap Submit

Tips & strategy

• Convert everything relative to the given city — add hours going east, subtract going west
• Watch for day rollovers past midnight when a city is far ahead or behind
• For the daytime hour, look for the overlap window the eastern and western cities share

What you'll learn

Clock Around is a timezone-conversion puzzle that tests how zones and offsets line up around the globe.

• Skills: time zones, UTC offsets, longitude and time
• Best for: roughly grades 5–10 (ages 10–16)
• For parents & teachers: time zones made logical, not just looked up.

About Clock Around

Clock Around is a timezone-conversion puzzle that tests how zones and offsets line up around the globe. It's an original, free browser game built in-house for PlayPendium.

A free, original browser game on PlayPendium — no download, no install. Browse all games →