That the calendar on this wiki page is not currently working. You can find the calendars for the project or groups you are looking for by looking at the individual calendar attached to the mailing list for that project or group or by looking on the LF Decentralized Trust public calendar. Note that not all of the existing community calls from the Hyperledger community have been moved over to the LFDT calendar yet.
Add Meetings To Your Calendar
...
You must be a subscriber to the mailing list you wish to manage, as well as send email to community-architects@hyperledger.org for Moderator access to edit the calendar for that list.
Upcoming Community Calls
Following is a calendar of community meetings. Times are GMT – if you need help converting meeting times to another time zone try this Time Zone Converter.
...