Hallo
Guten Morgen
Auf Wiedersehen, Tschüss
Gute Nacht

Hallo – Hello

Hallo is the most common and straightforward way to say "hello" in German. It's used in nearly all situations, both formal and informal, especially among younger people.
  • Used for both formal and informal situations, especially among younger speakers.
  • Can be used any time of day.
  • Similar to the English "hello."
Hallo

Guten Tag – Good Day

Guten Tag ("Good day") is a polite, standard greeting suitable for formal and semi-formal contexts. It’s typically used during daytime hours from about 9 AM to early evening.
  • Used in formal or professional situations.
  • Appropriate between strangers, colleagues, or in business.
  • Typically used from morning until early evening.
During daytime formal or semi-formal situations

Guten Morgen – Good Morning

Guten Morgen is used to wish someone a good morning, usually until about 10 or 11 AM. It’s appropriate in both formal and informal settings.
  • Used from waking hours until late morning.
  • Suitable for any situation where a morning greeting is needed.
Guten Morgen

Guten Abend – Good Evening

Guten Abend is the equivalent of "good evening" and is used from around 5 or 6 PM onward. It can be used for both greeting and parting in the evening.
  • Used when meeting people in the evening.
  • Appropriate in both formal and informal contexts.
In the evening, as a greeting or farewell

Auf Wiedersehen – Goodbye (Formal)

Auf Wiedersehen literally means "until we see each other again." It’s a formal way to say goodbye and is commonly used in professional or polite social settings.
  • Used primarily as a farewell.
  • Suitable for formal or semi-formal situations.
  • Implies you expect to see the person again.
Auf Wiedersehen, Tschüss

Tschüss – Bye (Informal)

Tschüss is an informal, casual way to say goodbye, commonly used among friends, family, and young people.
  • Not appropriate for formal situations.
  • Very common in everyday informal conversation.

Gute Nacht – Good Night

Gute Nacht is used when parting for the night or when someone is going to bed. It’s appropriate in both personal and family contexts.
  • Used when people are going to sleep or leaving at night.
  • Not typically used as a general evening farewell.
Gute Nacht

Summary

GermanEnglishWhen to UseFormality
HalloHelloAnytime, most situationsInformal/Formal*
Guten TagGood DayDaytime greetingFormal/Semi-formal
Guten MorgenGood MorningMorning (until ~10-11 AM)All
Guten AbendGood EveningEvening (from ~5-6 PM)All
Auf WiedersehenGoodbyeWhen partingFormal
TschüssByeCasual goodbyeInformal
Gute NachtGood NightWhen going to bedAll (Personal)

Conclusion

German greetings vary by time of day and level of formality. Mastering these basics will help you navigate social situations smoothly.
  • Use Hallo for a universal "hello."
  • Match greetings to the time of day: Guten Morgen, Guten Tag, Guten Abend.
  • Say goodbye with Auf Wiedersehen (formal) or Tschüss (informal).