How to convert the values in a column in another columns

Hello!

I have a dataset with a column named "months" wich values are "January 2003", "February 2003".... "January 2005"... and again.

And a second column with the number of events in each month-year.

I want to make differents columns corresponding to each year and they will have the value from each moth in that year. So I want a first column with months with values like January, February... and then one column for each year: 2003, 2004...

How can I do it?