How to use this days until calculator
- Pick a date, choose your target date in the date box (a birthday, holiday, deadline or event).
- Read the Days result, it shows how many days until that date, or how many days ago it was.
- Check the Weeks and Months figures and the status line, they update instantly as you choose.
Nothing is submitted or stored: your date never leaves your device, so you can plan privately.
How it counts the days
The calculator takes today at local midnight and your chosen date at midnight, then works out the difference between the two in whole days. A future date counts up to the day it arrives, and a past date counts how long ago it was. To make the same number easier to picture, the result is also shown asweeks (days divided by 7) and approximate months (days divided by 30.44, the average length of a month over a year). The weeks and months are rounded to one decimal place, so they are a quick guide rather than exact calendar months.
Time zones and "today"
Because the tool uses your device's local date, the meaning of "today" follows whatever time zone your computer or phone is set to. That is what you want almost all of the time, but if you are counting toward an event in another part of the world, remember that midnight there may fall on a different calendar day. For a simple countdown to a personal date, your local date is exactly right.
Frequently asked questions
How many days until a date?
Pick your target date and the calculator counts the whole days between today and that date. A future date shows how many days until it, a past date shows how many days ago it was.
Does it count today or the target day?
The result is the number of nights between the two dates, so tomorrow shows 1 day and today shows 0. That is the standard way a countdown is measured.
Why are weeks and months rounded?
Weeks are days divided by 7 and months use the average month length of 30.44 days, both rounded to one decimal. They are a quick guide, not exact calendar months.
Which time zone does it use?
It uses your device clock and your local date, so "today" follows whatever time zone your computer or phone is set to.
Is my data uploaded?
No, everything is calculated on your device and nothing is sent anywhere.