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Countdown to event

Count the days, hours and minutes from a start date until an event.

Built and maintained by The NumberPrism Editorial TeamEditorial policy

Your details

Decimal hours, so 17.5 means 17:30.

Results update as you type. The formula and assumptions are explained below the calculator.

Time until the event

30 days 9 hours 0 minutes

Event dateDecember 10, 2026 (Thursday)
Event time09:00
Whole days30 days
Total hours729 hours

The countdown starts at midnight on the from date and uses local clock time. No time zone conversion is applied.

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How to count down to an event

Set the counting start, event date and event time.

1

Choose the start date

Usually today, but it can be any earlier date.

2

Enter the event

Add the event date and a decimal time such as 9.5 for 09:30.

3

Read the countdown

The main result shows days, hours and minutes remaining.

What does this tool do?

An event countdown turns a future date into a concrete number of days, hours and minutes. Use it for exams, graduations, holidays, launches or appointments, and check the weekday before booking travel.

The Formula

Time until event = Event date and time − Start date at midnight

Frequently Asked Questions

What if the event is today?

The result counts hours and minutes from midnight on the from date. Choose an event time later than midnight to get a positive countdown.

Can I count down to a past date?

No. The event must fall after the start date. For elapsed time use the duration between timestamps calculator instead.