12 class = month. how does css modify the style of the current month without using jq?

12 months 12 class = month, css how to modify the style of the current month, do not use jq


January
February
March


April
May
June


July
August
September


October
November
December


For example, if the current month is 3

The css code modifies the background color of July.

------ Solution ----------------------
This cannot be done because the webpage loading speed is slow. when the loading is not completed, this will always appear. by default, do not add the current style to any td. this will be better and will not affect the usage.