happen on

verb

1. intr, preposition to find by chance

   I happened upon a five-pound note lying in the street

Example Sentences

Attacks on the police happen on average 100 times a day in the UK, the BBC has found.

From BBC

In the days running up to the election, the 2000 Octavia E. Butler essay, “A Few Rules for Predicting the Future,” started going semi-viral amongst left-learning voters, facing an overpresent dread no matter what was bound to happen on Nov. 5.

From Slate

But I will venture this: Nobody knows what’s going to happen on this election day or who’s going to win.

From Los Angeles Times

The 60-year-old said he voted early this year because he “didn’t want to get caught up in the shenanigans that possibly could happen on that day, computer-wise.”

From Los Angeles Times

But political events are just life events, and they happen on a cycle.

From Slate