Declension of the word "geburtstag"

Singular and plural for Geburtstag, m, strong declension     translation to English birthday, date of birth

Singular
Plural
Singular
Nominativ (Wer? Was?)
der Geburtstag
die Geburtstage
Genitiv (Wessen?)
des Geburtstages / Geburtstags
der Geburtstage
Dativ (Wem?)
dem Geburtstag / Geburtstage
den Geburtstagen
Akkusativ (Wen? Was?)
den Geburtstag
die Geburtstage
Plural
die Geburtstage
der Geburtstage
den Geburtstagen
die Geburtstage
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