Having a more visible current day box

Summary

The current day box is always a bit confusing. Often, I think today's "box" somewhere next to the correct box.

What is the current behavior?

What is the improved behavior?

horizontally center both the blue rounded highlight+day number and the day name, with the square box
add thin vertical line box separators, like the horizontal ones
have a blue thin square line around today's box

What does it bring?

Better understanding where to click for a given date, especially the current one