Countdown Date Calculator
Count down the days, weeks and months until a target date, including weekdays remaining.
Your inputs
Results
Days to go
66
- Weeks and days
- 9 weeks, 3 days
- Months and days
- 2 months, 5 days
- Weekdays remaining (Mon–Fri, after today)
- 48
- Target falls on a
- Friday
✓Exact calculation — rounded only for display
What this calculator does
Count down to holidays, exams, product launches or events, and see the time left as days, weeks, months and working days so you can plan the run-up.
Formula and method
Days = target − start; months and days by calendar counting; weekdays = Mon–Fri after the start date up to the target
Worked example
Calculated by this tool with its default inputs:
Inputs
- From date: 2026-10-20
- Target date: 2026-12-25
Results
- Days to go: 66
- Weeks and days: 9 weeks, 3 days
- Months and days: 2 months, 5 days
- Weekdays remaining (Mon–Fri, after today): 48
- Target falls on a: Friday
How to read the results
Zero means the target is the same day.
Assumptions and limitations
- Date-only arithmetic on the Gregorian calendar; results do not depend on your time zone or daylight-saving changes.
Questions
Does it update automatically?
Use the Today button to recalculate from the current date.
Methodology and verification
- Result type
- Exact mathematical calculation (rounded only for display)
- Formula version
- 1.0
- Automated verification
- 3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
- Editorial review
- Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.
Privacy
Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy