ics feed and hour out due to daylight saving

I have an ics feed on my calendar that provides the saints day. it’s showing as an all day event but as we’re in daylight saving at the moment everything seems to be out by an hour – instead of 12:00 midnight to 12:00 midnight the event is showing as 1am to 1am and therefore spanning across 2 days.

I can’t see a way to adjust it at all – help, it’s really bugging me now!!

https://www.ads-software.com/extend/plugins/all-in-one-event-calendar/