Date & Time
Calculate date differences, add days, ages, birthdays, and Unix timestamps. Every card below opens a real working tool, not a placeholder SEO page.
Days Between Dates
Calculate the number of calendar days between two dates.
Open tool → Date TimeAdd Days to Date
Add or subtract a number of calendar days from a date.
Open tool → Date TimeAge Calculator
Calculate age in completed years, months, and days between two dates.
Open tool → Date TimeBirthday Countdown
Find how many days remain until the next birthday.
Open tool → Date TimeUnix Timestamp Converter
Convert Unix seconds since 1970-01-01 UTC into a readable date and time.
Open tool → Date TimeSubtract Days from Date
Subtract a whole number of calendar days from a date.
Open tool → Date TimeBusiness Days Calculator
Count Monday-through-Friday days between two dates, excluding weekends.
Open tool → Date TimeWorking Days Calculator
Count weekday working days between two dates. Public holidays are not automatically excluded.
Open tool → Date TimeWeeks Between Dates
Calculate elapsed days and decimal weeks between two dates.
Open tool → Date TimeMonths Between Dates
Calculate complete calendar months and remaining days between two dates.
Open tool → Date TimeYears Between Dates
Calculate complete calendar years, months, and days between two dates.
Open tool → Date TimeTime Duration Calculator
Calculate elapsed time between two clock times within a 24-hour window.
Open tool → Date TimeDecimal Hours Calculator
Convert hours and minutes to decimal hours.
Open tool → Date TimeDay of Year Calculator
Find the ordinal day number within the year for a date.
Open tool → Date TimeLeap Year Checker
Check whether a Gregorian calendar year is a leap year.
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