Some places you can, but not everywhere.
Denmark's currency is the Krone, so the euro is not the currency of Denmark.
The UK and Denmark
Denmark did not leave the EU. It is still a member. It does not use the Euro, but that does not mean it is not in the EU. Some other EU countries do not use the Euro. Only 19 of the 28 member countries use it.
The currency used in Denmark is the Danish krone (DKK). Although Denmark is a country located in Northern Europe, it does not use the euro, which is the common currency in many European countries.
Denmark does not use the EURO as it was rejected at a popular referendum in Sep 2000. The Danish currency has been Kroner (Sing.: krone) since 1873. Prior to that the currency was Rigsdaler - a term that has been used since 16th century.
Some supermarkets accept EURO bills, but not coins. Your change will be Danish Crowns (or Kroners) though.Not many outlets, if any at all, will accept EURO's.
Denmark was included in the euro 1992 cup, in the place of Yugoslavia. As Yugoslavia were expelled from competing for the reason of the war. Denmark won the Euro 1992.
Denmark joined the EU in 1973 as one of the first countries.
No, Denmark uses the Danish Krone (abbreviated DKK). However, it shadows the Euro closely.
Denmark
In most stores in Denmark you are able to pay with Euro notes. You are not able to pay with Euro coins though.It depends. Mostly, you can't. Some stores accept euros though, but you probably can't get any euros back.