Better syncing of Garmin Connect Calendars with Google Calendar – Garmin Connect Web – Mobile Apps & Web – Garmin Forums

October 27, 2019

https://forums.garmin.com/apps-software/mobile-apps-web/f/garmin-connect-web/135157/better-syncing-of-garmin-connect-calendars-with-google-calendar

]what eventually works:
garmin => personal (non-institutional) outlook
=> publishing to get URL => paste URL into gcal