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Add / Subtract Dates
Add or subtract days, weeks, or months from a date
Runs locally in your browser
Parameters
Results
- Result date
- 2026-08-15
- Weekday
- Saturday
How it works
Adds or subtracts days, weeks, or months from a starting date.
Who it's for: Planners scheduling follow-ups, trials, and milestones.
Uses JavaScript Date calendar arithmetic for months.
How to use
- Choose Start date, Operation, Amount, and Unit.
- Read Result date and Weekday.
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