Islamic Calendar
Choose and verify the endpoints
Select the calendar for your input dates, enter both endpoints and calculate. The tool reports the separation between them; swapping the endpoints does not make the duration negative. Read the full dates again before sharing the result.
The years/months/days breakdown follows calendar boundaries. Total days counts the interval in days. A month is not always 30 days, so multiplying the month count by 30 will not reliably reproduce the total.
Worked example: elapsed versus inclusive
From 1 March 2026 to 8 March 2026, seven days elapse: exactly one week. If a booking or attendance rule counts both 1 March and 8 March as included dates, it counts eight dates instead. The extra date comes from the inclusive-counting convention, not a different calendar calculation.
For identical start and end dates, the elapsed interval is zero days, while a list of included dates contains one date. Agree on the counting convention before using a result for a deadline, booking or attendance record.
A leap-year check
From 28 February 2024 to 1 March 2024, two days elapse because 2024 includes 29 February. From 28 February 2025 to 1 March 2025, one day elapses. This is why counting month labels alone cannot determine the day interval.
Hijri and Gregorian breakdowns can use different numbers of years and months for the same pair of days. When comparing results across calendars, keep the actual endpoints fixed and distinguish the unit breakdown from the total-day result.
Dates are not exact timestamps
This tool compares calendar dates rather than two clock readings with specified time zones. A seven-date-day interval is not a substitute for calculating exact working hours or elapsed seconds across daylight-saving changes.
For a contractual deadline, first establish the required calendar, the inclusive/exclusive rule and the relevant time zone. Use a timestamp-aware tool when hours or a precise cutoff time matter.