1. What Is This Calculator For?

This calculator helps you determine the date that was exactly 120 days before a given date. It's useful for various purposes including financial calculations, project planning, and historical date tracking.

2. How Does The Calculation Work?

The calculation uses simple date arithmetic:

The calculator accounts for:

• Different month lengths
• Leap years
• Date validation

3. Practical Applications

Details: Useful for calculating deadlines, expiration dates, financial quarters, or any scenario where you need to look back exactly 120 days from a reference date.

4. Using The Calculator

Tips: Enter any valid date in the format YYYY-MM-DD. The calculator will automatically compute the date 120 days prior to your input date.

5. Frequently Asked Questions (FAQ)

Q1: Does this account for leap years?
A: Yes, the calculation automatically adjusts for leap years and varying month lengths.

Q2: What's the maximum date range?
A: The calculator can handle dates from 1970 through 2037 on most systems.

Q3: Can I calculate business days instead?
A: This calculator counts calendar days. For business days, you would need a different tool.

Q4: What if I need a different time period?
A: You can modify the code to calculate any number of days in the past or future.

Q5: How precise is this calculation?
A: It's precise to the day, not accounting for time zones or daylight saving changes.