Question 1

What date is 9 months after October 31?

Accepted Answer

9 months after October 31 is July 31.

Question 2

Is 9 months after October 31 always the same?

Accepted Answer

Yes — for a given month and day, 9 months forward consistently lands on July 31. Edge cases (like adding 9 months to January 31) clamp to the last valid day of the result month.

Question 3

What is 9 months before July 31?

Accepted Answer

9 months before July 31 brings you back to October 31.

9 Months After October 31

July 31