Unable to add selection of events from CNCF calendar

Moved manually from https://github.com/cncf/toc/issues/1222

[CNCF meeting calendar](https://tockify.com/cncf.public.events/monthly) is good:
- Public and transparent
- Central location

I can add the CNCF meeting calendar to my own calendar; this is also nice.

However it is not possible to add a selection of events. When I add the whole calendar, my calendar will be flooded.

To overcome this problem, I create copies of a selection of events in my own calendar.
This creates additional issues where my events get out of sync.

I find this important to reduce the cognitive load of maintainers / community members / TAG members / WG members.

Note: Let me know if there's a better place to have this issue.