The calendar below shows meetings organized by frontiers (including topical groups).
calendarfrontier
To create an event, make a page with a description. For example, for a meeting on 2020/04/17, make a page using this URL:
https://snowmass21.org/calendarfrontier/2020/04/17
(type it in the WWW browser). Then add a title and description (you must include the name of the frontier). The title of the page will create the text in this calendar (shown in green). If you click the date, you will go to a dedicated page.
To remove this event, remove all text from this page.