Date and time

Calculate dates, durations, week numbers, and time zones.

281 ready-to-use tools

Date and time

11 tools

Date and Time Difference CalculatorCalculate the elapsed days, hours, minutes, and seconds between two dates and times.

Date Addition and SubtractionAdd or subtract years, months, days, hours, or minutes from a date and inspect the resulting date and time.

Time Zone ConverterConvert a date and time between supported IANA time zones and compare the corresponding local times.

Week CalculatorFind a date's ISO week number, weekday, and day of the year using ISO week-date conventions.

Age CalculatorCalculate completed years and elapsed years, months, and days between a birth date and a target date.

Business Day CalculatorCount weekdays between two dates, with optional custom excluded dates and inclusive endpoints. Holiday calendars are not loaded automatically.

Duration ConverterConvert supported ISO 8601 duration strings to readable durations or parse readable durations into ISO notation.

Leap Year CheckerCheck whether a year is a leap year and view the number of days in that year.

Days in a Month CalculatorFind the number of days in a selected month and the weekdays of its first and last days.

Calendar Quarter CalculatorFind the calendar quarter containing a date and display that quarter's start and end dates.

Date Sequence GeneratorGenerate consecutive dates with a chosen daily, weekly, monthly, or yearly step and number of entries.