iOS Calendar Inaccurate?

I am in the Eastern Time Zone (New York) and the Guest World calendar seems to be inaccurate. It is my understanding that guest worlds changes midnight Eastern/9PM Pacific.

This was checked on 11JUL around 2PM Eastern and the worlds available to me and the calendar don’t seem to align:

My calendar says Richmond/London should be available but London/Yorkshire is available which implies I am a day ahead.