1. What is Weekly Time Difference?

The weekly time difference calculates how many weeks are between two dates. This is useful for project planning, pregnancy tracking, financial calculations, and any scenario where you need to measure time in weeks.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( Date1 \) — The starting date
• \( Date2 \) — The ending date
• 7 — Number of days in a week

Explanation: The calculator first computes the difference in days between the two dates, then divides by 7 to convert to weeks.

3. Importance of Time Difference Calculation

Details: Calculating time differences in weeks is essential for project management, medical applications (like pregnancy tracking), financial planning (interest calculations), and many other fields where weekly measurements are more meaningful than daily counts.

4. Using the Calculator

Tips: Simply enter the start date and end date in the format YYYY-MM-DD. The calculator will automatically compute the difference in weeks, including fractional weeks when applicable.

5. Frequently Asked Questions (FAQ)

Q1: Does the calculator account for leap years?
A: Yes, the PHP DateTime functions automatically account for leap years in their calculations.

Q2: What if Date2 is before Date1?
A: The calculator will return a negative number, indicating the time difference going backward.

Q3: How precise is the calculation?
A: The calculation is precise to the day, with results rounded to 2 decimal places for weeks.

Q4: Can I use this for business weeks only?
A: This calculator computes calendar weeks. For business weeks (excluding weekends), a more specialized calculator would be needed.

Q5: What's the maximum date range this can handle?
A: PHP's DateTime can handle a very wide range of dates, from year 1 to year 9999.