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