-- How can I make a cell return present month and remain as such.

Here's one way.

In Tools Options Calculation
Check the "Iteration" box
Set "Maximum iterations" to 1

In A2 put
=A2+1

In A1 put
=IF(A2=3,TEXT(TODAY(),"Mmmm"),A1)

Save the file.

Make several copies of the saved file for later use.

The first time one of the copies is opened, A1 should contain the present
month, and it shouldn't change as long as nobody overwrites A1 or A2.

Modify to suit.