1. What is Date Difference Calculation?

The Date Calculator computes the number of days between two calendar dates. It accounts for varying month lengths and leap years to provide an accurate count of elapsed days.

2. How Does the Calculator Work?

The calculator uses the following simple formula:

Where:

• \( Start\ Date \) — The beginning date of the period
• \( End\ Date \) — The ending date of the period

Explanation: The calculation counts all calendar days between the two dates, including the start date but excluding the end date.

3. Importance of Date Calculation

Details: Calculating days between dates is essential for project planning, contract durations, financial calculations, and various legal and business applications.

4. Using the Calculator

Tips: Select both start and end dates using the date picker. The end date should be equal to or later than the start date for meaningful results.

5. Frequently Asked Questions (FAQ)

Q1: Does the calculator count the start date?
A: Yes, the start date is counted as day 1 in the calculation.

Q2: How are leap years handled?
A: The calculation automatically accounts for leap years in the period between dates.

Q3: What's the maximum date range supported?
A: The calculator can handle any valid date range supported by PHP's DateTime class (typically years 1-9999).

Q4: Does time of day affect the calculation?
A: No, the calculation is based on calendar dates only, not times.

Q5: Can I calculate days excluding weekends?
A: This calculator provides total calendar days. For business days calculations, a different tool would be needed.