Date Calculator
Find the date N days from now, or the days between two dates.
Add or subtract time
Between two dates
About the Date Calculator
The first calculator adds or subtracts days, weeks, months or years from a reference date and shows the resulting date and weekday. The second shows how many days are between two dates, as weeks and days, as years, months and days, and how many of those days are weekdays (Monday to Friday). Public holidays are not taken into account.
Frequently asked questions
How do I calculate 100 days from a date?
Add 100 days to the reference date. If you count the reference day itself as day 1, add 99 days instead.
What is one month after January 31?
February has no 31st, so the calculator uses the last day of that month: February 28 (or 29 in a leap year).
Does the day count include the last day?
By default it is the simple difference. Tick 'Include the last day' to count both the start and end dates, which adds one day.
Are holidays removed from the weekday count?
No. Only Saturdays and Sundays are excluded. Subtract public holidays yourself if needed.
Is what I enter stored on a server?
No. Everything is calculated inside your browser. Nothing you enter is sent to or stored on any server.