Questions & Answers about Vi ventet et døgn.
Døgn means a full 24-hour period: day and night together.
That is different from dag, which often means day in the sense of:
- the daytime,
- a calendar day,
- or one day in a more general sense.
So Vi ventet et døgn specifically means we waited for 24 hours.
If you used dag, it might sound less precise.