Question 1

What date is 9 months before August 26?

Accepted Answer

9 months before August 26 is November 26.

Question 2

Is 9 months before August 26 always the same date?

Accepted Answer

Yes — when working with month/day only (no specific year), 9 months before August 26 consistently lands on November 26. In years where the result month has fewer days than the source, the day is clamped to the last valid day of the result month.

Question 3

What is 9 months after November 26?

Accepted Answer

9 months after November 26 brings you back to August 26 — the calculation is reversible.

Question 4

How do I calculate 9 months before a date?

Accepted Answer

Subtract 9 from the month number. If the result is 0 or negative, wrap around by adding 12. For example, August 26 is month 8, so 8 − 9 = 11, which is November.

9 Months Before August 26

November 26