How do you say good day in German?

There are several common ways to say "good day" in German, depending on the time of day and the level of formality.

Here are some:

1. Guten Morgen ("Good morning"): Used from morning until around noon.

2. Guten Tag ("Good day"): Used from noon until evening, in both informal and formal settings.

3. Guten Abend ("Good evening"): Used from evening until nighttime, in both informal and formal settings.

4. Guten Tag! ("Good day!"): This is a more informal way to say "good day" and can be used at any time of day.

5. Moin Moin or Moin (informal): A casual way to say "good day" in northern Germany, particularly in the morning.