Time & Date Calculators
24 toolsPlan, convert, and track time with 24 calculators: date differences, add/subtract date/time, business days, ISO weeks, age, time zones, world clocks, meeting planners, UTC/local, DST changes, epoch, calendars, workdays, countdowns, stopwatches, day-of-week, weekday counts, and astronomy (sunrise/sunset, Moon phases, seasons).
Dates & Durations (9)
Compute days between dates, add/subtract dates and times, exclude weekends/holidays for business days, find ISO week numbers, calculate age, measure differences down to hours/minutes/seconds, and check Julian day and leap year status.
Time Zones & Clocks (6)
Convert between cities/time zones, browse world clock listings, plan meetings across zones, switch UTC ↔ local time, verify DST changes, and translate epoch/unix timestamps.
Calendar & Extras (6)
Generate calendars (PDF), plan custom workdays/workweeks, set countdowns, run a stopwatch with splits, determine the day of the week for any date, and count occurrences of a specific weekday in a date range.
Sun, Moon & Astronomy (3)
Get precise sunrise and sunset times, track Moon phases with exact dates and times, and determine the astronomical start of the seasons (solstices and equinoxes).
More Time Calculators
- Real-Time World Clock
- Days Between Dates (date duration)
- Add/Subtract Date (days/months/years)
- Add/Subtract Time (h/min/s)
- Business Days Calculator (exclude weekends/holidays)
- Week Number & ISO Week Finder
- Age Calculator (years/months/days)
- Date Difference in Hours/Minutes/Seconds
- Julian Date/Day Calculator
- Leap Year Checker
- Time Zone Converter (between cities)
- Meeting Planner (common time across time zones)
- UTC ↔ Local Time Converter
- DST Change Checker (time changes)
- Epoch/Unix Time Converter
- Calendar Generator (month/year, export PDF)
- Workday/Workweek Planner (customized)
- Countdown Timer (until a date/time)
- Stopwatch & Split Times (web tool)
- Day of Week for Any Date (includes Doomsday rule)
- Count Specific Weekdays Between Dates (e.g., all Fridays)
- Sunrise and Sunset Times
- Moon Phases
- Seasons Calculator
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