Date Calculator - Add or Subtract Days

Add or subtract days, weeks, and months from any date to find a future or past date.

Monthly Calendar Widgets

Want this on your Home Screen?

These are real widgets from the app. Get the month calendar widget on your iPhone Home Screen and Lock Screen - synced with iOS Calendar and Google Calendar, updated automatically.

Clean White month calendar widget
Minimalist month calendar widget
Dark month calendar widget
DownloadSee all widgets

Frequently asked questions

How do I add days to a date?
Choose a starting date, set the direction to 'Add', and enter how many days, weeks, or months you want to move forward. The calculator shows the resulting date and the day of the week instantly.
How do I find what date it was a number of days ago?
Set the direction to 'Subtract' and enter the number of days. The tool counts backward from your start date and shows the exact past date, including the weekday.
Can it count business days?
This calculator counts calendar days, including weekends and holidays. To keep track of upcoming dates at a glance, the Monthly Calendar Widgets month grid highlights every date and event on your iPhone Home Screen.

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