How many months is fantasia?

"Fantasia" is a movie, not a unit of time. It doesn't have a duration measured in months.

Perhaps you're thinking of:

* The length of the movie Fantasia: It's approximately 124 minutes long.

* A specific time period related to the movie's release or production: Fantasia was released in 1940, but the production process spanned several years.

Please clarify what you mean by "months of Fantasia" so I can give you a more accurate answer.