Every clock uses your device's time and the official time zone rules for each city, the same database phones and computers use. Daylight saving time changes are applied automatically, so you never have to adjust anything.
Military time is the 24-hour clock. Hours run from 00 to 23, so 1:00 PM is 13:00 and 9:30 PM is 21:30. Tap 24h at the top to switch every clock at once, or 12h to go back to AM and PM.
Type in the Add a city box at the top. You can search by city, state, country or a nickname like NYC or Vegas. Smaller towns are matched to the nearest major city in the same time zone.
The bar under each clock is that city's day. The green band marks typical business hours, 9 AM to 5 PM, and the white marker shows the time there right now.
Scheduling a call across time zones? Use the World Meeting Clock to find a time that works for everyone.