Matrix Chart - Date Column Order

Hi,

I have a Matrix Chart with the following columns:

UserID |  January 2017  | February 2017  | March 2017 | etc... | Total

The values in the month columns are the amount spent by user that month.

I would like the columns to be in the following order:

UserID | Total |  March 2017 |  February 2017  |  January 2017  | etc..

I can't find the way to order the dates in reverse, with most recent month first.

Thank you in advance!

PS just had an idea of adding a column and indexing the dates in the order I want them - would that be considered a good practice?