The date, and the maths behind it.
The leader
Honest date and time calculators that show their working
Dates & Times is a set of free UK calendar, dates and time calculators. Where most tools hand you a number from a black box, Dates & Times shows the date maths and the official UK source behind it, so you can trust the result. Live countdowns, your exact age, days between two dates, the long-weekend maximiser that plans leave around the bank holidays, and statutory holiday entitlement, plus data pages built on the gov.uk Bank Holidays feed. No sign-up, no email, just the maths.
Start with the simplest question almost everyone has: how long until a date that matters. Enter the date and the countdown runs live, with the working a click away.
Countdown calculator
Live days, hours, minutes and seconds to any date you choose.
How this is worked out
The countdown is the difference between the current moment and midnight at the start of your target date, in your device's local time.
remaining = target date 00:00 − now
days = whole days in that gap, then the leftover splits into hours, minutes and seconds
It updates once a second. If the target date has already passed, the tool says so rather than showing a negative number.
For recurring UK dates such as bank holidays, see the bank holidays page, which lists the official gov.uk dates.
Where to next
The four desksCalculators and Data Desk, Dates & Times
Dates & Times's editorial desk builds and documents the calculators, citing the underlying date maths and the official UK source behind every number. Calendar and time tools are checked against primary UK sources such as the gov.uk Bank Holidays API before publication.
Last reviewed: 12 June 2026