Date tools
Calculators for planning leave, counting working days and checking week numbers. Tap a quick action on any tool, or open one below. Results are not stored as personal data — we only count which tool was used.
Days between two dates
Count whole days between two calendar dates. Use a quick action to fill this year, this month or Christmas, then calculate. For weekdays only, switch to working days.
Add or subtract days
Jump a date forwards or backwards. Try +7 or +14 from the chips, then open the matching month calendar.
Working days calculator
Count Monday–Friday between two dates. Tick the box to skip stored England and Wales bank holidays from GOV.UK.
Days until a date
How many midnights until a date, from today in Europe/London. Chips cover next Monday, Christmas and New Year.
Week number calculator
ISO week 1 contains 4 January. Weeks start on Monday. Try today, 1 January or 31 December — 1 January can sit in the previous ISO year.
Leap year checker
The Gregorian rule: divisible by 4, except centuries unless divisible by 400. Compare 2024, 2028, 2000 and 1900 with the chips.
Age calculator
Age in completed years, leftover months and days. The date of birth is used only for this calculation and is not stored in analytics.
Date-to-date countdown
A countdown from now to a date, including leftover hours and minutes. Useful for holidays and term dates.
Unix timestamp converter
Convert seconds since 1 January 1970 UTC into Europe/London time, or paste a date string. Use Now to capture this second.
Results use the same calendar engine as the yearly grids. Working-day counts can skip England and Wales dates from GOV.UK.