This is the 10001st most frequent German word.
ostertagen
"Ostertagen" is not a standard German word; potentially refers to "Easter days" (Ostertage).
Here, 'Ostertagen' is used in the dative case, plural, referring to the time spent during the Easter holiday period.
In den Ostertagen besuchten wir unsere Großeltern.
During the Easter holidays, we visited our grandparents.
In this sentence, 'Ostertagen' is in the genitive case, plural, signifying possession or association with the traditions of the Easter days.
Die Bräuche der Ostertagen bestehen aus Ostereiersuchen und Festessen.
The customs of the Easter holidays include Easter egg hunts and festive meals.
'Ostertagen' in this context is used in the dative case, plural, indicating a period of time associated with Easter in which the event occurred.