Alternate Row Background Colors by DATE

This is for our Calendar only: Instead of alternating each row’s background dark, light, dark, light, etc, I’d like to alternate them by date.

For example, we have 4 games on 1/24 and 4 more on 1/31, etc. I’d like each date to alternate color. So all games on 1/24 would have the same dark background while the next date would have light background.

Here’s our page now: http://www.beavertonsoccer.com/leagues/men-friday-indoor-soccer/

Is this possible?