There seems to be an issue with the display of race dates on GC.
I have a race I will participate on the 14th of April (Sunday), and at several places it appears to be on 13th of April (Saturday).
The link to the race: https://connect.garmin.com/modern/event/95ba2220-7140-4c8d-bdb7-7df3b469c9c3
It appears correctly on the calendar view:
However, if I go to the details, it shows the WRONG date (13th):
Again, if I go to edit the event, it appears correctly:
The reason I noticed this, that it also appears incorrectly on the new UI :
I assume, it is some kind of time zone issue.