All Date & Time Calculators
Find the right tool for your next date, deadline or countdown.
Days Between Dates
Compare two dates with calendar days, complete weeks and weekday counts. Choose whether to include the end date.
Date Difference Calculator
Compare two dates with calendar days, complete weeks and weekday counts. Choose whether to include the end date.
Weeks Between Dates
Count complete weeks and remaining calendar days between a start date and an end date.
Months Between Dates
Count complete calendar months between two dates using month-end anniversary clamping.
Years Between Dates
Find completed calendar years and the remaining months and days between two dates.
Date Calculator
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Add Days to a Date
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Subtract Days from a Date
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Date After Days
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Date Before Days
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Days From Today
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Days Ago
Move forward or backward by calendar days, weeks, months or years. Month-end dates clamp to the last valid day.
Business Days Calculator
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Working Days Calculator
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Business Days Between Dates
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Working Days Between Dates
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Business Days From Today
Find a future date by adding working days. Skip selected weekends and entered holidays.
Business Days Until
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Days Until
Find the calendar days from today to a target date. Today follows the selected time zone.
Days Since
Count elapsed calendar days from a past date to today in the selected time zone.
Countdown Calculator
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Birthday Countdown
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Wedding Countdown
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Vacation Countdown
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Exam Countdown
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Retirement Countdown
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
School Countdown
Choose a target date and time for a live countdown. Birthday and anniversary modes can repeat every year.
Birthday Calculator
Find the date a person reaches a specific age. Leap-day birthdays use February 28 in common years.
Anniversary Calculator
Find a future anniversary from the original date and anniversary number.
Retirement Date Calculator
Find the date a person reaches a chosen retirement age. Enter a birth date and target age.
Day of the Week
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Day of the Year
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
ISO Week Number
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Leap Year Calculator
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Days in a Year
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Days in a Month
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Weeks in a Year
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Weekdays in a Year
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Weekend Days in a Year
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Days Remaining in the Year
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Calendar Generator
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Time Until
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Time Between Two Times
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Hours Between Dates
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Minutes Between Times
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Seconds Between Dates
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Hours Until
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Minutes Until
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Seconds Until
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Time Difference Calculator
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Countdown Timer
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Time From Now
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
Time Ago
Compare local date-times or add a duration. Elapsed hours reflect daylight-saving transitions in the browser’s time zone.
World Clock
Compare the current time in cities around the world.
Time Zone Converter
Convert an exact UTC instant to another IANA time zone.
Flip Clock
A large live clock with local time and a full-screen option.
Time Unit Converter
Convert seconds, minutes, hours, days and weeks. Months and years are calendar units rather than fixed durations.
Birthstone Calculator
Find the traditional birthstone associated with a birth month.
7 Days From Today
The date 7 calendar days after today. Updates at midnight in your selected time zone.
7 Days Ago
The date 7 calendar days before today. Updates at midnight in your selected time zone.
10 Days From Today
The date 10 calendar days after today. Updates at midnight in your selected time zone.
10 Days Ago
The date 10 calendar days before today. Updates at midnight in your selected time zone.
14 Days From Today
The date 14 calendar days after today. Updates at midnight in your selected time zone.
14 Days Ago
The date 14 calendar days before today. Updates at midnight in your selected time zone.
21 Days From Today
The date 21 calendar days after today. Updates at midnight in your selected time zone.
21 Days Ago
The date 21 calendar days before today. Updates at midnight in your selected time zone.
30 Days From Today
The date 30 calendar days after today. Updates at midnight in your selected time zone.
30 Days Ago
The date 30 calendar days before today. Updates at midnight in your selected time zone.
45 Days From Today
The date 45 calendar days after today. Updates at midnight in your selected time zone.
45 Days Ago
The date 45 calendar days before today. Updates at midnight in your selected time zone.
60 Days From Today
The date 60 calendar days after today. Updates at midnight in your selected time zone.
60 Days Ago
The date 60 calendar days before today. Updates at midnight in your selected time zone.
90 Days From Today
The date 90 calendar days after today. Updates at midnight in your selected time zone.
90 Days Ago
The date 90 calendar days before today. Updates at midnight in your selected time zone.
100 Days From Today
The date 100 calendar days after today. Updates at midnight in your selected time zone.
100 Days Ago
The date 100 calendar days before today. Updates at midnight in your selected time zone.
120 Days From Today
The date 120 calendar days after today. Updates at midnight in your selected time zone.
120 Days Ago
The date 120 calendar days before today. Updates at midnight in your selected time zone.
180 Days From Today
The date 180 calendar days after today. Updates at midnight in your selected time zone.
180 Days Ago
The date 180 calendar days before today. Updates at midnight in your selected time zone.
365 Days From Today
The date 365 calendar days after today. Updates at midnight in your selected time zone.
365 Days Ago
The date 365 calendar days before today. Updates at midnight in your selected time zone.
United States Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
United Kingdom Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Canada Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Australia Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Germany Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Singapore Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Hong Kong Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
China Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Indonesia Business Days Calculator
Count working dates with a chosen weekend pattern, year-specific holiday records and custom closures.
Date Midpoint Calculator
Find the halfway point between two calendar dates, including a midday midpoint for odd-length intervals.
Date Range Overlap Calculator
Compare two date ranges and see their shared dates, overlap length and endpoint convention.
Weekday Counter
Break a date range into Monday-to-Sunday totals and choose whether to count its end date.
Weekend Days Between Dates
Count Saturdays and Sundays in a date range with a full weekday breakdown.
Nth Weekday of a Month
Find the first, second, third, fourth, fifth or last occurrence of a weekday in a chosen month.
Last Weekday of a Month
Find the last Monday, Tuesday or other selected weekday in any Gregorian month.
Recurring Date Generator
Build a daily, weekly, monthly or yearly schedule directly from its original date anchor.
Date Range List Generator
List the dates in a range and optionally keep only Monday-to-Friday dates.
Next Leap Year Calculator
Find the next leap year on or after a selected year and inspect the century exceptions.
Leap Years Between Years
List all Gregorian leap years within an inclusive start-year and end-year range.
Quarter Calculator
Find the quarter, quarter boundaries and day position for a date, with a selectable fiscal-year start.
Quarter Start & End Dates
Look up the first and last calendar dates of the quarter containing your selected date.
Year Progress Calculator
See the share of a calendar year completed before a selected date, with day totals and remaining dates.
Month Progress Calculator
See the share of a calendar month completed before a selected date and its exact day count.
Unix Timestamp Converter
Convert Unix seconds or milliseconds to an exact UTC date-time, or convert a UTC date-time to a timestamp.
Add Time Durations
Add two hours, minutes and seconds durations, carrying extra seconds and minutes correctly.
Subtract Time Durations
Subtract one duration from another and keep the result’s positive or negative direction.
Work Hours & Breaks Calculator
Calculate a dated shift’s elapsed hours and deduct a chosen break duration.
ISO Week Date Converter
Convert an ISO week-year, week number and Monday-to-Sunday weekday to a calendar date.
Day of Year to Date Converter
Convert a year and ordinal day number into a validated calendar date.
Days Old Milestone Calculator
Find your 10,000th day or another chosen day-count milestone directly from a birth date.
PST to EST Converter
Convert Pacific to Eastern time with a source date, midnight rollover and a choice of fixed standard time or date-aware local zones.
EST to PST Converter
Convert Eastern to Pacific time with a source date, previous-day results and date-aware daylight-saving rules.
Keep exploring
View the tool libraryDays Between Dates
Compare two dates with calendar days, complete weeks and weekday counts. Choose whether to include the end date.
Business Days Calculator
Count working days using your weekend pattern and optional excluded dates. Public holidays are excluded only when entered.
Day of the Week
Inspect a Gregorian date, leap-year rules, ISO week numbers and a printable month calendar.
Time Zone Converter
Convert an exact UTC instant to another IANA time zone.
