All time and date tools
Clocks, converters, planners and date utilities, each described in one line. Everything runs in your browser, free and without signup.
Clocks and time zones
- World clockLive local time in major cities, with day/night and working-hours cues. Add your own cities; they are kept in this browser.
- Time zone converterConvert a date and time from one city or time zone to another. Daylight saving and date changes are handled for the exact date you pick.
- Exact timeCheck how far your device clock is from our server's reference time, and how to fix it if it has drifted.
- Daylight saving timeThe next clock changes for major countries, with the date, the new UTC offset and which way the clocks move.
Meetings and planning
- Meeting plannerLine up working hours for several cities on one timeline and pick an hour that suits everyone.
- TimerCountdown timer with presets or a custom duration, pause and reset, and a beep when time is up.
- StopwatchStopwatch with lap times. Once you have two or more laps, the fastest and slowest are highlighted.
Dates and calendars
- Today's dateToday's date, day of the year and ISO week, plus the same day in other calendar systems.
- Week numberThe current ISO 8601 week number, the US-style week number, and the week for any date you enter.
- Year progressHow much of the year has passed, with quarter, month, week and day progress in your time zone.
Developer and calendar utilities
- Unix timestamp converterConvert Unix timestamps to readable dates and back, in seconds or milliseconds.
- Discord timestamp generatorBuild <t:…> codes that Discord shows in each reader's own local time.
- Cron expression translatorTranslate a cron expression into plain English and list its next run times in a time zone you choose.
- CSV to calendar (.ics)Turn a spreadsheet of events into an .ics file you can import into Google Calendar, Outlook or Apple Calendar.
More tools
These tools work but are still being reviewed, so they are not yet listed in search results and may change.
- Find a meeting timeRanks candidate meeting slots for a group of cities.
- Recurring meeting driftShows how a weekly meeting moves for each city across daylight-saving changes.
- Follow-the-sun handoffsPlan round-the-clock handoffs between regional teams.
- Date calculatorsDays between dates, business days, age and other date maths.
- 2026 calendarPrintable yearly calendar with ISO week numbers.
- Time untilTime remaining until a date and time you choose.
- Age calculatorExact age in years, months and days, and the next birthday.
- Time in N hoursAdd or subtract time from now and see the result in other cities.
- Pomodoro timerFocus and break sessions with configurable lengths.
- Jet lag plannerA sleep-shift plan for a long-haul trip.
- Sunrise and sunsetDaylight hours for a place and date.
- Time zone referenceIANA time zones with their current UTC offsets.
- Holiday overlapPublic holidays that affect a team spread across countries.
- Historical timeWhat the local time and offset were on a past date.
- Country comparisonTime zones and working-hour overlap between two countries.
- Clock widgetsEmbeddable clocks for your own site.
Questions
- Are these tools free?
- Yes. Every tool on this page runs in your browser with no account and no signup. Cities, teams and preferences you save are kept in your browser on this device.
- Do the tools handle daylight saving time?
- Yes. Clocks, converters and planners use IANA time zone IDs (such as Europe/London), so each region's daylight-saving changes are applied on the right dates instead of assuming a fixed UTC offset.
- What are the tools listed under "More tools"?
- They work, but we are still reviewing them, so they are not yet listed in search results. They may change while that review is under way.
Time zone and daylight-saving rules come from the IANA Time Zone Database, applied by your browser and our server. How we source and calculate times