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Calculate date differences or add/subtract time from any date.
The Date Calculator is a versatile utility for all your calendar-based calculations. Whether you need to find the exact number of days between two historical events, calculate your project's deadline by adding business days, or determine exactly how many weeks have passed since a specific milestone, this tool provides precise answers. It handles complex calendar logic like varying month lengths and leap years automatically, giving you a detailed breakdown in years, months, weeks, and total days.
Input
2026-05-07 + 90 daysOutput
2026-08-05By default, the difference is calculated as the total time elapsed between the two dates (exclusive of the start date itself).
Yes, the calculator uses the standard Gregorian calendar logic which correctly accounts for February 29th in leap years.
The tool shows the absolute difference between two dates and indicates whether the second date is in the past or future relative to the first.