Calendar change higlight style

I have a calendar object , I want make some special date highlight and change highlight date style. better define by myself.

You can add a custom draw hook similar to the one used in calendar:

can I do that?

Yes, you can add bottom border in a custom the draw_event.

it’s seem no key LV_CALENDAR_CTRL_HIGHLIGHT or something of LV_CALENDAR_CTRL* in version 7.11.1

All wrote is for v8.
For v7 see Calendar (lv_calendar) — LVGL documentation

other question, how to clear highlight date in v7.1

Just set the new highlighted dates.

Hello, is there a way to change the highlighted dates and make each highlighted day a different color in v8.3.