1. What is Days Calculation?

Days calculation determines the number of calendar days between two dates. This is useful for project planning, legal matters, financial calculations, and personal scheduling.

2. How Does the Calculator Work?

The calculator uses simple date arithmetic:

Where:

• \( End\ Date \) — The later date in the range
• \( Start\ Date \) — The earlier date in the range

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

3. Importance of Days Calculation

Details: Accurate day counting is essential for contract durations, interest calculations, medication schedules, and any time-sensitive planning.

4. Using the Calculator

Tips: Enter both dates in YYYY-MM-DD format. The end date must be equal to or later than the start date.

5. Frequently Asked Questions (FAQ)

Q1: Does this include both start and end dates?
A: By default, it includes the start date but excludes the end date in the count.

Q2: How are leap years handled?
A: The calculation automatically accounts for leap years in the date range.

Q3: What's the maximum date range?
A: The calculator can handle any valid date range within PHP's DateTime limitations.

Q4: Does time of day affect the calculation?
A: No, this calculates full calendar days regardless of time.

Q5: Can I calculate working days only?
A: This calculator counts all calendar days. For business days, you'd need to exclude weekends and holidays.