About
timedate.now is a fast, static-first reference for world time, time zones, sunrise, calendars, alarms, timers, and date math — built to load instantly and answer your question in the first screen.
What you'll find here
- Live local time for every major city worldwide (population over 250,000).
- Time zone information including IANA designations, UTC offsets, and daylight saving rules.
- Free in-browser tools: alarm, stopwatch, timer, countdown, calendar, week number, and time-zone converter.
- Astronomy data — sunrise, sunset, twilight tiers, and moon phases.
- Educational articles about time, weather, holidays, and astronomy.
How it's built
Every reference page is statically generated for fast loads and reliable Core Web Vitals. Tools run entirely in your browser — nothing is sent to a server. Time ticks accurately on the client using the IANA tz database via the browser's Intl.DateTimeFormat.
Editorial approach
The goal is to answer practical time and date questions quickly: what time is it there, what zone is this city in, when does the sun rise, and what date does that land on locally. Reference pages stay compact, while tool pages focus on immediate utility rather than sign-up flows or heavy client code.
- Reference pages are written for quick scanning on desktop and mobile.
- Clocks and timers are client-side so they keep working without a round trip.
- Country, city, region, and time-zone pages are cross-linked so you can move between related data quickly.
Privacy
Tool state (alarms, stopwatch laps, timer presets) is stored only in your browser's local storage. Read the full privacy policy for details.