Your timetable · visible arithmetic
Prayer schedule offset calculator
This is a neutral clock adjustment for comparing printed timetables, travel notes or manually entered schedules.
The offset is never recommended or inferred: enter the signed number of minutes yourself.
Formula
How it is calculated
adjusted time = original time + signed minute offset- Enter the original clock time.
- Enter a positive or negative minute adjustment.
- Normalize the result to a 24-hour clock and retain the day shift.
What the result means
The page performs the exact adjustment you supply. It does not recommend a safety margin or alter a prayer timetable.
All decision-bearing times, offsets or coordinates remain visible inputs. The page does not look up a hidden local convention, mosque timetable or current location.
Limits and local confirmation
The result is clock arithmetic, not a determination of when a prayer begins. Calculation methods, local observations, high-latitude rules and authority timetables can differ.
For worship planning, confirm the applicable times, method and interpretation with the local mosque or authority you follow.
Questions about this calculation
Does this schedule-offset calculator choose prayer times for me?
No. It uses only the timetable values or coordinates you enter. Obtain prayer times and method guidance from a trusted local timetable, mosque or authority.
Does it store my values or location?
No. The arithmetic runs in your browser and the form does not submit coordinates, times or results to a server.
What happens when an interval crosses midnight?
Clock-interval tools move forward on a 24-hour clock, so an end time earlier than the start is treated as occurring on the following calendar day.
Need a full location-based timetable? Use the prayer times and Qibla calculator.