Time Offset Calculator
Move a time by any span
Hours, minutes and seconds applied to an instant, with the resulting timestamp, the date rollover, and any daylight-saving transition the span crossed.
Questions people ask
The things that come up about time offset calculators, answered plainly.
What is the difference between a time offset and a UTC offset?
This moves an instant along the timeline. A UTC offset relabels the same instant in another zone — the moment does not change, only the clock reading. The UTC offset calculator is the tool for that.
Related tools
Move a date forwards or backwards by a span, with the calendar's rules applied.
Date Offset CalculatorOne field for the whole offset — `2y 3mo 10d`, `+6 weeks`, `-90 days` — applied in calendar order, with each step shown so you can see what happened.
Add HoursHours added to an instant, with the date rollover shown, and a note when the span crosses a daylight-saving change and the clock does not move by what you added.
UTC Offset CalculatorThe current offset for any zone, in `+05:30` form and in minutes, with the standard and summer offsets and the dates it switches between them.
Time Difference CalculatorTwo clock times or two full timestamps, and the difference in hours, minutes and seconds — including the overnight case, where the end time is smaller than the start.