Days Between Two Dates Calculator
Calculate the number of days, weeks, or months between any two dates. Add or subtract days from a date.
How the Date Calculator Works
This calculator computes the exact number of days between any two dates using calendar math. It accounts for varying month lengths (28-31 days) and leap years. Business days exclude weekends but not public holidays. Use "Add days" mode to find a date 90, 180, or 365 days from any starting date — common for contracts, deadlines, and planning.
Common Date Calculations
90 days from today: Common for business contracts and probation periods. 180 days: Passport validity requirements for many countries. 365 days: One calendar year. 280 days: Full-term pregnancy from last menstrual period. 10,000 days: A milestone birthday (approximately age 27 years, 5 months).
Date calculator searches peak around New Year (people counting down), tax season (90-day and 180-day deadlines), and back-to-school (calculating semester lengths). "How many days until" is one of the most typed phrases into Google globally.
