A common six-month window question — a visa’s permitted stay, a notice period, or a fixed contractual deadline — answered directly from a start date.
How it works
Adding 180 days (adjustable) to the start date, using UTC-based date arithmetic so daylight-saving-time shifts never silently change the day count.
What this does not include
This does not include business-day-only counting (skipping weekends) — this calculator adds calendar days.
How to use this calculator
- Enter the start date; adjust the day count if needed.
Frequently asked questions
Why is 180 days a commonly tracked window?
It’s roughly six months, often used for visa permitted-stay limits, insurance waiting periods, and contract notice clauses.
Does this account for leap years?
Yes — the underlying date arithmetic correctly counts through February 29 in a leap year without any special handling needed.
Can I change the number of days?
Yes — the day count defaults to 180 but is fully adjustable for any similar fixed-window question.
