You can use Google Calendar regardless of whether others cooperate. I maintain the sparse So_CA_Beachcats_Sailors calendar, and would be happy to give you admin access if you PM me your email address, since anything you might add would be appropriate there. (I *love* Google calendars because one can overlay others' calendars on one's own, including "Weather," "Phases of the Moon," and even ABYC tide tables if you generate them.)

But I concur that asking others to even try to edit a calendar seldom works.

--Glenn