1. What is the 90 Days Back Calculator?

This calculator determines the date that is exactly 90 days prior to a given date. It's commonly used for payment purposes, financial calculations, and various business applications where a 90-day lookback period is required.

2. How Does the Calculator Work?

The calculator uses simple date arithmetic:

Where:

• Today — The current date or any specified date
• 90 days — The fixed period to subtract

Explanation: The calculation accounts for varying month lengths and leap years to ensure accurate date subtraction.

3. Importance of Date Calculation

Details: Accurate date calculations are crucial for financial transactions, payment terms, contract deadlines, and various business processes that involve specific time periods.

4. Using the Calculator

Tips: Enter the reference date in YYYY-MM-DD format or use today's date by default. The calculator will automatically compute the date 90 days prior.

5. Frequently Asked Questions (FAQ)

Q1: Does this account for business days or calendar days?
A: This calculates calendar days (including weekends and holidays). For business days, a different calculation would be needed.

Q2: What if I need a different time period?
A: You can modify the calculation by changing the number of days in the formula.

Q3: How precise is this calculation?
A: The calculation is exact, accounting for all calendar variations including leap years.

Q4: Can I use this for future dates?
A: Yes, the calculator works for any valid date, past or future.

Q5: What are common uses for this calculation?
A: Common uses include payment term calculations, contract deadlines, financial reporting periods, and various business process timelines.