1. What Is This Calculator?

This calculator helps you determine the date that was 30 days ago from a given date, along with the approximate number of months that have passed.

2. How Does It Work?

The calculator uses simple date arithmetic:

Where:

• Today — The reference date you provide
• 30 days — Standard month approximation

Note: This uses a fixed 30-day month approximation. For precise month calculations that account for varying month lengths, more complex logic would be needed.

3. Practical Applications

Details: Useful for calculating deadlines, expiration dates, or any scenario where you need to know what date was approximately one month ago.

4. Using The Calculator

Tips: Simply enter any date in the format YYYY-MM-DD and click calculate to see what date was 30 days prior and how many months that represents.

5. Frequently Asked Questions (FAQ)

Q1: Is this exactly one month ago?
A: This calculates 30 days ago, which is an approximation of one month. Actual months vary in length (28-31 days).

Q2: How accurate is the months calculation?
A: It's an approximation based on 30-day months. For precise month counting, calendar months should be used.

Q3: Can I calculate dates in the future?
A: Yes, you can enter any date and it will calculate 30 days prior to that date.

Q4: What's the maximum date range?
A: The calculator can handle any valid date within PHP's DateTime range (typically years 0-9999).

Q5: How does this handle leap years?
A: The calculation automatically accounts for leap years when subtracting days.