1. What is the 90 Days Ago Calculator?

The 90 Days Ago Calculator calculates the date that was exactly 90 days before a given date (typically today's date). This is useful for various purposes including financial calculations, legal deadlines, and project planning.

2. How Does the Calculator Work?

The calculator uses simple date arithmetic:

Where:

• Today — The reference date (defaults to current date)
• 90 days — The fixed period to subtract

Explanation: The calculator accurately accounts for varying month lengths and leap years when performing the date subtraction.

3. Importance of Date Calculation

Details: Calculating dates 90 days in the past is important for tracking deadlines, compliance periods, financial quarters, and many business processes.

4. Using the Calculator

Tips: Enter any date in YYYY-MM-DD format (defaults to today). The calculator will show the date exactly 90 days prior.

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: Can I calculate 90 days from any date?
A: Yes, simply enter your desired reference date instead of today's date.

Q3: What's the equivalent in months?
A: Approximately 3 months, though exact duration varies slightly due to month length differences.

Q4: How is this different from 3 months ago?
A: 90 days is exactly 90 days, while "3 months ago" depends on calendar months and can be 89-92 days.

Q5: Can I calculate other time periods?
A: This calculator is specifically for 90 days, but you can modify the code for other periods.