Complex table transformation - Insert rows between 2000 rows and move column data to row d

I have a spreadsheet with 60 columns and 2000 rows worth of data. It is formatted like the table on the left in the screenshot. I need to get it into the format on the right.


So basically, I want to insert n number of rows after each row with data and then move data in the columns to the newly created rows.

2019-06-25_14-00-09.png

If it goes in order in groups of three its very simple. You just type May, June July in the first three columns, then set the next three cells equal to the corresponding cells and drag all the way down. So like in your example you would start in B3 and type "May", B4 June, B5 July... and then in B6 you put the formula = B3, then in B7 = b4, then in b8 = b5, then just simply highlight b6-b8 and drag the formula down.