Home / Guides

Guides

Plain-English explainers for the questions we get most about time: why the clocks change, how time zones work, and how to plan around them.

• Daylight saving time explainedWhen the clocks change in the US, Europe and Australia, why it happens at 2 AM, and who skips it.
• Why Arizona doesn't change its clocksThe history, the heat, and the Navajo Nation exception that confuses everyone.
• How time zones workUTC offsets, half-hour zones, the date line, and why China uses one time zone.
• Best time to call between countriesCalling windows from the US to the UK, India, the Philippines, Japan and Australia.
• Game release times explainedMidnight local vs global unlocks, why New Zealand plays first, and how pre-loads work.
• UTC vs GMTThe same time most days, but not the same thing. Plus what BST and Zulu time mean.