The capital, Copenhagen, is located at the most eastern side of Zealand.
Most of the islands are situated in the small shallow sea of Kattegat and the Baltic Sea, between Jutland and Sweden.
Separated from the other islands, Bornholm lies by itself between Sweden and Poland in the Baltic Sea.
While all three have their own constituent parliaments, they are also part of The Kingdom of Denmark with Queen Margrethe II as symbolic monarch.
The main part of Denmark proper is Jutland, a peninsula north of Germany, but Denmark also includes a great number of islands, of which the major ones are Zealand and Funen.
If the opportunity is there then great, but don’t be offended if your date demands to split the bill 50/50.