Moin is used at all times of day, not just in the morning. The reduplicated form moin moin is often heard, although some authors claim it is regarded by locals as tourists' usage. The German comic character Werner always greets with Moin.
Etymology
Many people think that moin derives from various regional pronunciations of Morgen, which tend to alter, vocalise, or skip rg. However, the word may actually also derive from the Dutch, Frisian, and Low German word moi, meaning "beautiful" or "good". Similar forms in Low Saxon are mooien Dag, mooien Abend, mooien Moren. Possibly, as is common in etymology, one origin is correct but spread thanks to its oral assimilation with the other term. The Luxembourgishcognate of the word is moien, which can mean either "hi" or "morning". Unlike Guten Morgen, moin can be used 24 hours a day. It is semantically equivalent to the Low Saxon greeting Dagg and replaced it in many areas. In Hessen, mojn is used for hello and good bye, but mojn mojn is solely used for good bye. The double form Moin Moin is also used as an all day greeting in for example Flensburg that belonged to Denmark until 1864 and the Swedish region of Scania, part of Denmark until 1658. Moin is also very similar to the Norwegian greeting "Morn" which is also often used twice when the greeter is in a particularly good mood. It is short for "god morgen" which means "good morning", but people use it at all times of the day.
Moi
In Finland, a similar greeting moi is used for "hello", "hi" in the Finnish language. However, "moi moi" is used as a good bye, similarly to "bye bye" in English, even with a similar intonation. Both are particularly typical of Southwestern Finnish, but through internal migration spread to the capital and with the help of TV to the rest of the language area. Moi's use is identical to that of hei: diminutive forms heippa and moikka, and duplication as a good bye. Southwest Finland traded with Hanseatic cities, so it is plausible that the greeting was borrowed from their dialects. Moro is found in some parts of Finland and has also been used in the same way as moi. It is theorised that it comes from Tampere due to its large number of foreign workers and like moi has been borrowed from and abbreviated. "Moi" is also used in Dutch Low Saxon dialects in the eastern part of the provinces Groningen and Drenthe.
