Populate 120 cell column with successive months entering only firs

[Guest]

I have a column of 120 cells I want to populate with successive months
repeating, of course, 10 times. The start month can be any month of the year.
I want to be able to enter only the start month and the rest of the column
will populate automatically with successive months.

 

[Guest]

in A1 enter the start date
in a2 enter =DATE(YEAR(a1),MONTH(a1)+1,1)
copy a2 to a3 down to a120

 

[Guest]

or

in A1 enter the start date
In a2 =EOMONTH(a1,1)

Format cells as mmmm to see just the month

 

[Guest]

LanceB, your second suggestion below worked like a champ. Thanks.