1. What Is This Calculator?

This calculator helps you determine the date that was exactly 30 days before a given date (typically today's date). It's useful for various time-based calculations in business, health, and personal planning.

2. How Does It Work?

The calculator uses simple date arithmetic:

The calculation accounts for varying month lengths and leap years automatically.

3. Practical Applications

Details: Useful for tracking 30-day periods in medication schedules, return policies, billing cycles, and any situation requiring a one-month lookback period.

4. Using the Calculator

Tips:

• Default shows calculation from today's date
• You can enter any date to calculate 30 days prior
• Results are displayed in YYYY-MM-DD format

5. Frequently Asked Questions (FAQ)

Q1: Does this account for different month lengths?
A: Yes, the calculation automatically adjusts for months with 28, 30, or 31 days.

Q2: How is this different from "one month ago"?
A: 30 days is always exactly 30 days, while "one month ago" would be the same calendar date in the previous month (which could be 28-31 days earlier).

Q3: Can I calculate other day intervals?
A: This calculator specifically calculates 30 days. For other intervals, you would need a different calculator.

Q4: What date format should I use?
A: The calculator uses the standard YYYY-MM-DD format, but will accept any valid date input.

Q5: Does this work for dates in the past or future?
A: Yes, you can enter any valid date and it will calculate the date 30 days prior.