1. What is Days Between Dates Calculation?

The days between dates calculation determines the exact number of days between two calendar dates. This is useful for project planning, age calculation, billing cycles, and many other applications.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Date1 \) — The earlier date
• \( Date2 \) — The later date

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

3. Importance of Date Difference Calculation

Details: Accurate day counting is essential for financial calculations, legal deadlines, project management, and personal event planning.

4. Using the Calculator

Tips: Enter both dates in YYYY-MM-DD format. The calculator will automatically determine which date is earlier and calculate the difference accordingly.

5. Frequently Asked Questions (FAQ)

Q1: Does the calculator include both start and end dates?
A: No, it counts the days between the dates, including the start date but excluding the end date.

Q2: How does it handle leap years?
A: The calculation automatically accounts for leap years in the period between the dates.

Q3: Can I calculate days between BC and AD dates?
A: No, this calculator is designed for dates in the common era (AD).

Q4: What's the maximum date range it can handle?
A: The calculator can handle any valid date range supported by PHP's DateTime class.

Q5: Does time of day affect the calculation?
A: No, the calculation is based on calendar days only, ignoring time components.