Accurate Date Forecasting for Legal and Business Deadlines
Whether calculating a 90-day warranty expiration, a 30-day notice period for residential leases, or a 180-day patent review window, date projection requires precise arithmetic. Simply adding 30 days is not the same as adding 1 month.
Frequently Asked Questions
How do I add days to a date?
Select your start date, select whether you want to add or subtract, enter the quantity, and choose the unit (days, weeks, months, or years). The tool computes the precise future or past date accounting for variable month lengths.
What happens when adding a month from January 31?
Because February only has 28 days (or 29 in a leap year), adding 1 month to January 31 lands on February 28 (or 29). Our algorithm automatically caps the date to the last valid day of the target month.