This is the 121st most frequent Bulgarian word.
май
"May" (the month) or "perhaps/maybe."
In this sentence, 'май' is used as a particle to express uncertainty or assumption about the statement.
Май ще вали дъжд.
It seems it will rain.
Here, 'май' refers to the name of the month in the calendar.
Това е май на годината.
This is the month of May.
In this context, 'май' is short for 'майка,' which means 'mother' in Bulgarian, used in a familiar or colloquial tone.