This is the 234th most frequent Hungarian word.
április
"Április" means "April" in English.
Here, 'április' is used in the locative case (Áprilisban) to indicate 'in April'.
Áprilisban kezdődnek a tavaszi ünnepek.
In April, the spring celebrations begin.
Here, 'április' is used as the subject of the sentence, representing the name of the fourth month of the year.
Április egy hónap a naptárban.
April is a month in the calendar.
Here, 'április' is again in locative case (Áprilisban) to describe the time context of the statement.