Countdown Calculator
See exactly how many days, weeks and months remain until any date — or how long ago it was.
How it works
days left = target date − today, counted in whole calendar days
The countdown compares calendar dates, not clock hours: it is the number of midnights between now and the target, so it drops by one at midnight rather than at some hour of the day. On the target date itself it reads zero. If the date has already passed, the calculator flips around and tells you how long ago it was instead.
Worked example
On September 11, 2026 the countdown to January 1, 2027 reads 112 days — exactly 16 weeks, or 3 months, 21 days — and the target falls on a Friday.
Frequently asked questions
Does the countdown include today?
No — it counts the days still to come. Tomorrow is 1 day away, and the target date itself reads 0. If you want an inclusive count for planning, add 1.
Why is it not based on 24-hour blocks?
Because “days until” in normal speech means calendar days: on the evening of the 10th, an event on the 12th is 2 days away even though fewer than 48 hours remain.
Can I count from a past date?
Yes — enter any past date and the result becomes “days since”, with the same weeks and months breakdown.
Related calculators
This calculator is for educational purposes. Double-check important results before acting on them.