1. What is the 90 Days Before Calculator?

The 90 Days Before Calculator calculates the date that is exactly 90 days prior to a given date. This is useful for various planning, legal, and business purposes where a 90-day period is significant.

2. How Does the Calculator Work?

The calculator uses simple date arithmetic:

The calculation accounts for varying month lengths and leap years to ensure accuracy.

3. Practical Applications

Details: This calculation is commonly used in legal contexts (like contract terms), financial planning, project management, and medical treatments where 90-day periods are significant.

4. Using the Calculator

Tips: Simply enter any valid date in YYYY-MM-DD format and click calculate. The result will show the date exactly 90 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 if I need business days instead of calendar days?
A: This calculator uses calendar days. For business days (excluding weekends/holidays), a different calculation would be needed.

Q3: Can I calculate dates more than 90 days before?
A: This calculator is specifically for 90 days, but you could use it multiple times for longer periods.

Q4: What's the earliest date I can input?
A: The calculator works with any date after 1901-12-14 (due to PHP date limitations).

Q5: How precise is this calculation?
A: It's precise to the day, calculating exactly 90 calendar days before your input date.