Days Until Calculator
A live countdown to any date and time: days, hours, minutes and seconds left, plus the breakdown in years and months. Presets for New Year, Christmas and birthdays.
Defaults to your browser's zone. Daylight saving time is applied from the IANA time-zone database.
Days until New Year
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About this tool
How it works: the current moment is read from your device clock, the target date and time are read in the time zone you choose and converted to an exact instant with the IANA time-zone database. The countdown is the difference between the two instants and ticks every second; the years-months-days breakdown counts whole calendar months first, so it matches how people say “2 months and 5 days”.
Presets always pick the next occurrence: New Year is the coming 1 January at midnight, Christmas the coming 25 December, and a birthday the next anniversary of the date of birth (29 February birthdays fall on 28 February in common years). Once a target has passed, the counter turns into a time-since display.
Turn on business days to see how many working days are left, with weekends and, for a chosen country, public holidays skipped. The shareable link stores the target, time zone and options in the address. To measure the span between two fixed dates, use the days between dates calculator; for exact age use the age calculator, and to compare clocks across cities the time zone converter.
Formula
time left = target instant − now (UTC, DST-aware)days = ⌊time left ÷ 86 400 s⌋; hours = ⌊rest ÷ 3 600 s⌋; minutes = ⌊rest ÷ 60 s⌋; seconds = restY M D = whole months from today while ≤ target, then days and clock timenext birthday = birth month/day in the current year, or next year if already passed (29 Feb → 28 Feb)business days left = days − weekend days − public holidays on workdays
How it is calculated
- Pick a preset (New Year, Christmas, Birthday) or Custom date.
- For a custom date you can add an exact time in 24-hour or 12-hour format; for a birthday enter the date of birth.
- Check the time zone: your browser's zone is preselected, and the event happens at that local time.
- Watch the live countdown in days, hours, minutes and seconds, and read the years-months-days breakdown.
- Turn on business days and pick a country to see working days left.
- Copy the shareable link to send the same countdown to someone else.
Questions
How many days until Christmas?
Choose the Christmas preset: it counts down to the next 25 December at 00:00 in your time zone. From 14 October 2026, for example, that is 72 days. The live counter on this page always shows the exact figure for right now.
How do I count the days until my birthday?
Pick Birthday and enter your date of birth. The calculator finds the next anniversary (this year, or next year if it has passed), counts down to midnight of that day and tells you the age you will turn. If you were born on 29 February, common years use 28 February.
Is today counted?
The countdown runs from this exact second, so the rest of today is part of the hours shown and the whole days are the full days left. Tick “Include the end date” if the target day itself should count as a full day, e.g. for “days until the end of the holiday”.
What happens with time zones and daylight saving time?
The event happens at the local time of the zone you select, e.g. midnight in New York for a New Year countdown there. If a daylight-saving change falls inside the countdown, the hours left include it, so the countdown reaches zero at the right moment.
Can I share my countdown?
Yes. “Copy shareable link” stores the preset or date, time, event name, time zone and options in the URL. Anyone who opens it sees the same live countdown, ticking from their own current time.