Subtract Days Calculator
Subtract days calculator
Subtract date ranges with calendar-day or business-day modes, holiday calendars, and preset offsets.
InputsDate & time4 fieldsLive
Result
2026-06-21
Subtracted 14 day(s) using calendar-day mode, excluding start date.
Live update
Formula
Result date = start date shifted backward by selected counting mode Symbol legend
| Symbol | Meaning | Unit | Copy |
|---|---|---|---|
D_{start} | Starting date | calendar date | |
n | Day amount to subtract | days | |
mode | Calendar, weekdays, or weekdays + holidays | - |
- Choose the initial date and preset or custom day amount.
- Select calendar-day mode, weekdays-only mode, or weekdays plus holiday-calendar mode.
- Optionally include the starting date as day 1, then return the shifted earlier date.
Example
Worked example: subtract 14 weekdays
- 1 Start date = 2026-06-20
- 2 Preset n = 14
- 3 Mode = weekdays only, exclude start date
- 4 Result date = computed weekday-only offset
Weekday and holiday assumptions can change the target date versus plain calendar subtraction.
How
- Pick the base date.
- Choose a preset or enter a custom day count.
- Set counting mode and include-start behavior.
- Check the resulting earlier date.
Avoid
- Using non-integer values for day offset.
- Mixing calendar-day and weekday assumptions when comparing schedules.
- Forgetting include-start can shift the output by one counted day.
FAQ
Can this move across years?
Yes, subtraction works across month and year boundaries.
Can I skip weekends and holidays?
Yes. Choose weekdays-only mode or weekdays plus holiday-calendar mode.
What does include start date mean?
When enabled, the starting date counts as day 1 if it is part of the chosen counting mode.
Switch
Switch12
No match.