I noticed some people dialing into our Zoom conference system for legacy events that were removed from our calendar end of June or events that are current but have had an adjusted date.

Please remember that our event schedule is located in our Global Calendar and that can be located (and added to your client) here:
https://www.openchainproject.org/community

Because we have a broad global community, sometimes our events change to avoid holidays or other things that might result in reduced attendance.

My suggestion is to add the calendar to your email client with this link to ensure you are always current:
https://calendar.google.com/calendar/embed?src=c_08seb6095ofjtfr5fjb5tabgl4%40group.calendar.google.com&ctz=Asia%2FTokyo