Date & time

Date Difference Calculator

Signed calendar days from start date up to but excluding end date. Enter your own values; the result updates only when you run the tool.

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Date & time

Age Calculator

Completed years at your reference date; February 29 anniversaries fall on March 1 in non-leap years. Enter your own values; the result updates only when you run the tool.

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Date & time

Business Days Calculator

Count Monday–Friday in the half-open date range; holidays are not excluded. Enter your own values; the result updates only when you run the tool.

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Date & time

Complete Months Between Dates

Count completed month anniversaries based on the day of month. Enter your own values; the result updates only when you run the tool.

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Date & time

Date Add or Subtract Days

Add a signed number of calendar days to a Gregorian date. Enter your own values; the result updates only when you run the tool.

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Date & time

Date Add or Subtract Months

Shift calendar months, clamping to the last valid day of the resulting month. Enter your own values; the result updates only when you run the tool.

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Date & time

Day of Week Finder

Find the weekday of a Gregorian calendar date. Enter your own values; the result updates only when you run the tool.

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Date & time

Day of Year Calculator

Ordinal day within the year, starting at one on January 1. Enter your own values; the result updates only when you run the tool.

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Date & time

Days Until Date

Signed days until your target using the reference date you choose. Enter your own values; the result updates only when you run the tool.

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Date & time

ISO Week Number

ISO weeks start Monday; week 1 contains the first Thursday of the year. Enter your own values; the result updates only when you run the tool.

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Date & time

Leap Year Checker

Gregorian leap years are divisible by 4 except centuries not divisible by 400. Enter your own values; the result updates only when you run the tool.

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Date & time

Time Duration Calculator

Elapsed minutes, treating an earlier end time as next day; identical times mean zero. Enter your own values; the result updates only when you run the tool.

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Date & time

Weeks Between Dates

Signed elapsed calendar days divided by seven. Enter your own values; the result updates only when you run the tool.

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Date & time

Work Hours Calculator

Paid hours = elapsed shift time minus unpaid breaks. Enter your own values; the result updates only when you run the tool.

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