Date calculator

Days between two dates, or a date moved by days, weeks, months or years.

Days between two dates

From

Count the last day too

Choose both dates to see the gap.

Add to or subtract from a date

Date

Add or subtract

AddSubtract

Years

Months

Weeks

Days

Enter the numbers to see the result.

Days between two dates

The calculator counts the days from the first date to the second without counting the first, the usual way to count a gap: from 1 to 10 March is 9 days. Choose to count the last day too when both days belong in the count, as for a leave or an application window. The same gap is also given in weeks and in years, months and days.

Adding and subtracting

Years and months are added first, keeping the day of the month: 15 March plus two months is 15 May. When a month has no such day, its last day is used, so 31 January plus one month is 28 February, or 29 February in a leap year. Weeks and days are added after that.

What it is useful for

Find how many days are left until an exam or a form’s last date, the date 90 days after a notification, or how long a period of service lasted. For your age on a date, use the age calculator.

Questions

How many days are there between two dates?

Enter both dates: the calculator gives the number of days, and the same gap in weeks and in years, months and days. It works whichever date comes first.

Are the first and last days counted?

The count runs from one date to the other, so the first day is not counted. Choose to count the last day too when you want both days in the count.

What is one month after 31 January?

The last day of February: 28 February, or 29 February in a leap year, because February has no 31st.

Days between two dates

Questions

How many days are there between two dates?

Enter both dates: the calculator gives the number of days, and the same gap in weeks and in years, months and days. It works whichever date comes first.

Are the first and last days counted?

The count runs from one date to the other, so the first day is not counted. Choose to count the last day too when you want both days in the count.

What is one month after 31 January?

The last day of February: 28 February, or 29 February in a leap year, because February has no 31st.