Time & Date
World clocks, time zones, calendars, timers, date arithmetic and duration tools.
Choose a category
UTCWorld Time & Time Zones5 tools◷Dates & Date Arithmetic24 toolsUTCTimers & Countdowns2 tools◷Calendars & Special Dates3 toolsUTCOther Time Tools6 tools
World Time & Time Zones
◷Countdown to Any DateCount down to a date and time in a selected time zone, showing days, hours, minutes and seconds.UTCEvent Time AnnouncerEnter an event once and show its corresponding local time in major world time zones.UTCMeeting Time Zone PlannerCompare one proposed meeting time across three world time zones and see whether it falls within typical working hours.UTCTime Zone ConverterConvert a date and time between major IANA time zones with daylight-saving rules applied.WCWorld ClockSee the current local date and time in major world time zones using your browser's IANA time-zone data.
Dates & Date Arithmetic
ACAge CalculatorCalculate age from a date of birth.◷Weekday CounterCount Monday-to-Friday weekdays between two dates.⏱Countdown CalculatorCalculate days, hours and minutes until a future date/time.◷Date CalculatorAdd or subtract years, months and days from a calendar date.◷Date DifferenceShow the calendar difference between two dates in years, months and days.◷Date Pattern CalculatorCheck common numeric date formats for simple patterns such as palindromes.◷Date & Time Add or Subtract CalculatorAdd or subtract years, months, weeks, days, hours, minutes and seconds from any starting date and time.a:bDate and Time Duration CalculatorCalculate the elapsed days, hours, minutes and seconds between two date-times.◷Date to Unix TimestampConvert a local date and time to Unix seconds.◷Days Between DatesCalculate the number of days between two dates.◷Days Until or Since a DateCalculate the whole calendar-day difference between today and another date.◷Doomsday Weekday CalculatorFind a date's weekday using John Conway's Doomsday algorithm.UTCEpoch Seconds, Milliseconds, Microseconds & NanosecondsConvert epoch values in common units to an ISO UTC date when the value falls within the browser's date range.◷Hours Between Date/TimesCalculate elapsed hours between two date/time values.◷ISO 8601 Date & Time ConverterParse an ISO 8601 date/time and show UTC, Unix timestamp and browser-local representations.◷Months Between DatesEstimate complete calendar months between two dates.◷Quarter of YearFind the calendar quarter for a date.AIAge in Days, Hours, Minutes & SecondsCalculate how many days, weeks, hours, minutes and seconds have elapsed since a date and time.a:bTime Duration CalculatorCalculate the elapsed time between two clock times, including optional overnight spans.UTCUnix Timestamp ConverterConvert Unix timestamps to UTC dates and UTC dates back to Unix seconds from one canonical tool.UTCUTC Offset ConverterConvert a date and time between two fixed UTC offsets.WNWeek Number CalculatorFind the ISO week number for a date.◷Weekday CalculatorFind the day of the week for any valid calendar date.WCWorkdays CalculatorCount Monday-to-Friday weekdays between two dates without assuming a country's public-holiday calendar.
Timers & Countdowns
Calendars & Special Dates
Other Time Tools
◷Day of Year CalculatorFind the ordinal day number within a year.◷Days in MonthFind the number of days in a selected month.0xDecimal Hours ConverterConvert decimal hours into hours, minutes and seconds.◷Leap Year CheckerCheck whether a year is a leap year.UTCTime Difference CalculatorCalculate hours and minutes between two clock times.UTCTime Unit ConverterConvert between seconds, minutes, hours, days and weeks in either direction.
Date Arithmetic & Elapsed Time
◷Subtract Days From DateSubtract a number of days from any date.◷Add Weeks To DateAdd whole or partial weeks to a date.◷Subtract Weeks From DateSubtract whole or partial weeks from a date.◷Add Months To DateAdd months to a date while keeping the calendar day where possible.◷Subtract Months From DateSubtract months from a date while keeping the calendar day where possible.◷Add Years To DateAdd years to a date, including leap-year handling.◷Working Days Between DatesCount Monday-to-Friday days between two dates, excluding weekends.◷Age In Days CalculatorCalculate exactly how many days have passed since a date.◷Time Until Date CalculatorFind the number of days, hours and minutes between two date-times.◷Decimal Hours To Hours & MinutesConvert decimal hours such as 1.75 into hours and minutes.