Greenland is not a member of the EU, but has a special fisheries agreement and was accepted as one of the overseas countries and territories with special association with the EU.
National day: 21 June (longest day of the year)
Form of government: Self-government, within the kingdom of Denmark
Parliament: Inatsisartut (31 seats)
EU membership: From 1 January 1973 to 1 February 1985
NATO membership: Since 1949 (as part of Denmark’s membership)
I doubt you'll get a straight answer. The RWR flag-shaggers on here are as clueless about what 'sovereignty is as they are as clueless about what 'patriotism' is.
Remember their bleating's about Brexit and sovereignty? Not a single one of the morons mentions the word since the whole shít-show turned out to be one big dog turd.