fall on

US /fɔːl ɑːn/
UK /fɔːl ɑːn/
"fall on" picture
1.

to attack someone or something suddenly and aggressively

:
The wolves fell on the deer.
The angry crowd fell on the protestors.
2.

to be the responsibility of someone

:
The task of organizing the event fell on her.
The blame for the mistake fell on the new employee.
3.

to coincide with a particular date or day

:
This year, Christmas falls on a Tuesday.
Her birthday falls on the same day as mine.