Date Calculator
Add or subtract time from a date, or calculate the difference between two dates. It’s useful for planning deadlines, schedules, and timelines.
Inputs
Exclude weekends
Business days = Monday–Friday.
Difference
0 days
Positive means the “to” date is after the “from” date.
How to use it
- Pick a mode: date difference or add/subtract.
- Enter the relevant date(s).
- Optionally exclude weekends for a basic business-day estimate.
- Review the result and copy it into your plan.
FAQ
When enabled, business days exclude weekends. You can also exclude US federal holidays and add custom holiday dates.
The day difference is the number of calendar days between the two dates. If both dates are the same, the difference is 0.
Months have different lengths. Date differences can be expressed in days or as calendar months/years depending on definition.
Yes—weeks are just 7-day increments in the add/subtract mode.
This tool treats dates as local calendar dates. Time zone edge cases can affect midnight boundaries in some cases.
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Disclaimer
Date calculations can vary based on time zones, observed holidays, and business rules. Verify critical deadlines using official sources.