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Calendar and date tools

Count days, plan meetings across time zones, and make calendar invites. 9 tools · free, no sign-up

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Most popular

ICS Event GeneratorMake a calendar invite that works in any calendar app.Date Difference CalculatorCount the days, weeks, and months between two dates.Age CalculatorExact age in years, months, and days, plus the next birthday.

All Calendar tools9

event→icsICS Event GeneratorMake a calendar invite that works in any calendar app.date→daysDate Difference CalculatorCount the days, weeks, and months between two dates.date→ageAge CalculatorExact age in years, months, and days, plus the next birthday.date→timerCountdown GeneratorMake a live countdown and share it as a link.date→workdaysBusiness Days CalculatorCount working days between two dates, skipping weekends and holidays.rule→icsRecurring Date GeneratorTurn a repeating schedule into a list of dates.time→zonesTime Zone Meeting PlannerSee one meeting time on everyone’s clock.text→dateDate Format ConverterTurn Unix timestamps into readable dates, and back.date→dayDay of the WeekFind which weekday any date falls on, past or future.

Guides

RRULE in plain EnglishWhat every part of an iCalendar RRULE means — FREQ, INTERVAL, BYDAY, BYMONTHDAY, BYSETPOS, COUNT and UNTIL — with worked examples, and the dates a rule silently skips.Business days, working days and calendar daysWhether Saturday is a business day, whether "2 business days" includes today, and how business, working and calendar days differ — with the counting rules deadlines actually use.How to create an .ics file, and what is inside oneFour ways to make an iCalendar (.ics) file — writing one by hand, exporting from Outlook, Google Calendar or Apple Calendar, or generating one — and the parts of the format that trip people up.How to find a meeting time across time zonesHow to find a meeting time that works across time zones: the working-hour overlap between common cities, the weeks when clocks change on different dates, and how to send an invite nobody misreads.

About these tools

How many days until the holiday? How old will I be on that date? What’s 10 working days from today? What time is 3 pm London in Tokyo? These tools answer the everyday date and time questions.

Dates are trickier than they look: months have different lengths, leap years add a day, and clocks change on different weekends in different countries. Every tool here handles all of that, so the answers are right.

Make a calendar invite that works in Google, Outlook, and Apple Calendar, or share a countdown or meeting time as a link. Links never expire, because everything is stored in the link itself — nothing is saved anywhere.

Questions people ask

What’s an .ics file?

A calendar event file. Google Calendar, Outlook, Apple Calendar, and almost every other calendar app can open it, so it’s the easiest way to send someone an event.

Do these tools handle the clocks changing?

Yes. Daylight saving is worked out for the exact date you pick, not for today.

Which public holidays are built in?

US federal holidays and England & Wales bank holidays, worked out from their official rules so they stay right in future years. You can add any others yourself.

Do shared links expire?

Never. Everything is stored in the link itself, so there’s nothing to delete or time out.