Date Calculators

Date calculator

Add days, weeks, months or years to a date, or take them away, to find the date you need.

Whole days on the UK calendar. The start date starts as today.

Today, unless you change it.
Add or take away

90 days after 14 November 2026 is Friday 12 February 2027.

Day of the weekFriday
Days from the start date90

Show the workings
StepSumAnswer
14 November 2026 plus 90 days12 February 202790 days

Where the figures come from

This sum uses only the numbers you entered.

Adding months and years

Adding a month moves to the same day in the next month: 14 March plus one month is 14 April. Where that day does not exist, such as 31 April or 29 February in a year that is not a leap year, the date moves back to the last day of the month. So 31 January plus one month is 28 February, or 29 February in a leap year.

Days and weeks

Days and weeks are counted on the calendar, so 90 days from a date is exactly 90 days later, weekends included. A week is 7 days.

Work out something else