Projection - Revenue Shift

[imarler]

I have created some projections assuming the initial month is February 2020. I would like to have a manual fill cell wherein a month can be typed and all the data will shift as if that typed month is the initial month. In other words, if I type May 2020 in the fill cell, all data which currently begins in the February column, will shift over three columns and now begin in the May column. Thank you.