What is Add Days to Date Calculator?
A date add/subtract calculator lets you add or subtract days, weeks, months, and years from any date to find a future or past date instantly. It handles month-end edge cases (e.g., adding 1 month to January 31 gives February 28), leap years, and varying month lengths automatically.
How to Add or Subtract Days from a Date
Calculate future or past dates by adding or subtracting days, weeks, months, and years from any starting date.
- Enter the starting date: Select your starting date using the date picker or type it manually.
- Specify the amount to add or subtract: Enter the number of days, weeks, months, or years you want to add (positive) or subtract (negative).
- View the result: The calculator shows the resulting date, the day of the week, total days between the dates, and the week number.
Frequently Asked Questions
How do I add days to a date?
Enter your starting date in the calculator, then specify the number of days to add. The tool instantly shows the resulting date, including the day of the week and total day count.
How do I subtract months from a date?
Enter the starting date, then input the number of months to subtract. The calculator handles varying month lengths and leap years automatically, clamping to month-end when needed.
What date is 90 days from today?
Use our date add calculator and enter today's date with +90 days. The tool calculates the exact result, accounting for different month lengths. For example, 90 days from January 1 is April 1.
What date is 30 days from now?
Enter today's date and add 30 days. The calculator accounts for months with 28, 29, 30, or 31 days to give you the exact result with the day of the week.
How do I find a date in the past?
Enter any start date and subtract days, months, or years using negative values. The calculator works for both future and past date calculations.
What happens when I add 1 month to January 31?
Adding 1 month to January 31 gives February 28 (or February 29 in a leap year). Our calculator automatically handles month-end edge cases so you always get a valid date.
Can I add weeks to a date?
Yes, you can add or subtract weeks from any date. Each week equals 7 days. For example, adding 2 weeks to January 1 gives January 15.