septemberdagur
nafnorð karlkyn
Fallbeygingar
Eintala
eintala með greini
nefnifall
septemberdagur
septemberdagurinn
þolfall
septemberdag
septemberdaginn
þágufall
septemberdegi
septemberdeginum
eignarfall
septemberdags
septemberdagsins
Fleirtala
fleirtala með greini
nefnifall
septemberdagar
septemberdagarnir
þolfall
septemberdaga
septemberdagana
þágufall
septemberdögum
septemberdögunum
eignarfall
septemberdaga
septemberdaganna