Full day events in google calendar are shown set to a completely wrong date.

[ElGauchooooo]

I'm using this ical sensor to retrieve the next n upcoming events and show them on my dashboard. Today i've seen, that there are some birthdays (full day events) popping up, that are clearly wrong. I've checked, and the sensor really lists them on that day, yet the actual ical file shows the correct date:

BEGIN:VEVENT
DTSTART;VALUE=DATE:20200603
DTEND;VALUE=DATE:20200604
RRULE:FREQ=YEARLY;WKST=MO;INTERVAL=1;BYMONTHDAY=3
DTSTAMP:20220727T080307Z
ORGANIZER;---removed----
CREATED:20200605T174636Z
DESCRIPTION:
LAST-MODIFIED:20200605T174636Z
LOCATION:
SEQUENCE:1
STATUS:TENTATIVE
SUMMARY:Birthday Person XYZ
TRANSP:OPAQUE
BEGIN:VALARM
ACTION:DISPLAY
DESCRIPTION:This is an event reminder
TRIGGER:-P0DT7H0M0S
END:VALARM
END:VEVENT

shows up as: