The problem

I use the Remote Calendar integration to track Google's public holiday calendar. (I prefer this to the Holiday integration in the hope that it will also track non-fixed holidays as well).

"Holidays in Thailand" public iCal: https://calendar.google.com/calendar/ical/en.th%23holiday%40group.v.calendar.google.com/public/basic.ics

From this calendar, 11-May-2025 (Sun) is "Visakha Bucha" day and 12-May-2025 (Mon) is "Day off for Visakha Bucha". Both are national holidays.

Remote Calendar fetches the event from the ical and displays it in the Home Assistant calendar correctly. However, while on 11-May-2025, the entity was ON, on 12-May-2025, the entity became OFF albeit it's being "Day off for Visakha Bucha" day.

Home Assistant Core Version: 2025.5.1

What version of Home Assistant Core has the issue?

2025.5.1

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

Remote Calendar

Link to integration documentation on our website

https://www.home-assistant.io/integrations/remote_calendar

Diagnostics information

No response

Example YAML snippet

Anything in the logs that might be useful for us?

Additional information

No response