Date & calendar Tools
Browse calculators, calendars, timers and reference tools. The complete collection is below.
Date & calendar
Printable Year Calendar
Print all twelve months on one page. Choose the year and the first day of the week, with optional holidays from the saved country dataset.
Date & calendarAge Calculator
Calculate age in completed years, months and days on any chosen date, along with the total number of days between the dates.
Date & calendarDate Duration Calculator
Find the number of days, weeks, and calendar years, months and days between two dates. Choose whether to include the end date.
Date & calendarBusiness Days Calculator
Count working days between two dates with a choice of weekends and a list of dates to exclude as holidays.
Date & calendarAdd or Subtract Days
Add or subtract a number of calendar days or weeks from a date to find a deadline, follow-up date or project milestone.
Date & calendarDay of the Week Calculator
Find which day of the week any Gregorian date falls on, plus its day number in the year and whether it is a leap year.
Date & calendarISO Week Number Calculator
Find the ISO 8601 week number and week-year for a date, together with the Monday and Sunday of that week.
Date & calendarPrintable Monthly Calendar
View and print a clean Gregorian monthly calendar, with Monday or Sunday as the first day of the week.
Date & calendarChinese Calendar Date Converter
Convert a Gregorian date to its Chinese calendar year, month and day using your browser’s built-in calendar support.
Date & calendarHijri Date Converter
Convert a Gregorian date to an Islamic calendar date using either the civil tabular calendar or the Saudi Umm al-Qura calendar.
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