Hello,

Do you mean the day boxes in module calendar ?...

Well, no a feature 'ive planned to do for now, as not easy to manage in case of multiple events per day.
And the other reason is the day bowes are small and not readeable if an image in background.

In all cases, some things could be possible for a specific need, but this means to have a frontend developer (of skills!) to create a custom theme pack, and create own layout for calendar layouts.

Happy Holidays!
Best regards,
Cyril