市政厅会议
https://calendar.google.com/calendar/ical/5dd0f8a01f779563f563a452252f78ddb0da21665b7f96c060bd8c5c2785d195%40group.calendar.google.com/public/basic.ics
SeeDAO所有工会会议
https://calendar.google.com/calendar/ical/c704ce5098512b0b0d70722e6430af4221e3c9ebc6d1e72aa70b82c80bb6999f%40group.calendar.google.com/public/basic.ics