How the Date Calculator Works

The calculator uses the standard Gregorian calendar system:

• Days Between Two Dates = End Date – Start Date
• Add or Subtract from a Date = Base Date ± (Number of Days)
• Adjustments are made for leap years (every 4 years, except centuries not divisible by 400).
• Holidays are determined based on whether they are fixed (same date each year) or floating (specific weekday of a month).

Example Calculation

• Start Date: January 1, 2025
• End Date: March 15, 2025
• Result: 73 days (10 weeks and 3 days).
• If you add 30 days to March 15, the new date will be April 14, 2025.

Frequently Asked Questions (FAQs)

Q1: How do I calculate days between two dates?
You can enter your start and end dates in the date difference calculator to see the exact days, weeks, and months between them.

Q2: What is the difference between fixed and floating holidays?
Fixed holidays (e.g., Christmas on December 25) fall on the same date every year. Floating holidays (e.g., Memorial Day) depend on the weekday pattern in a specific month.

Q3: Does the Date Calculator account for leap years?
Yes. The tool follows leap year rules of the Gregorian calendar, meaning it includes February 29 every four years (except some century years).

Q4: Can I use this to calculate working or business days?
Yes. The business days calculator version excludes weekends and can also adjust for U.S. federal holidays like Labor Day, Juneteenth Day, or Veterans Day.

Conclusion

When you need to calculate days until a holiday, plan paid leave, or understand calendar history from the Julian to the Gregorian calendar, our Date Calculator is the perfect tool. Try it now to save time, plan smarter, and never miss an important holiday or event again!