Date Subtraction Calculator
Subtract days, weeks, months, or years from a date with practical quick presets.
Quick presets
Subtract 30 days
2026-01-22
Useful for deadlines, schedules, billing cycles, and planning. Month/year math follows the native calendar rules.
Examples
Subtract 7 days for prior-week comparisons, 30 days for billing lookbacks, and 365 days for year-over-year checks.
Frequently asked questions
How do I subtract days from a date?
Choose a date, set the amount, and pick days to calculate the earlier date.
Can I subtract months or years?
Yes. Use the unit selector to subtract weeks, months, or years.
Why does month subtraction change the day sometimes?
Different month lengths can shift the resulting day when the target month is shorter.
Does this work for leap years?
Yes. Leap-year and month-length rules are applied automatically.