This is the 702nd most frequent Polish word.
listopadzie
"Listopadzie" is the locative form of "listopad," meaning "November" in Polish.
The word 'listopadzie' is the locative case of 'listopad' (November), used here indicating the time during which something happens.
W listopadzie często pada deszcz.
In November, it rains often.
'Listopadzie' is in the locative case, denoting the month in which the event of birth occurred.
Mój tata urodził się w listopadzie.
My father was born in November.
Again, 'listopadzie' functions in the locative case, showing the time frame of falling leaves.