Full Idea
I propose to identify an event with a property, or in other words with a class, a unique spatio-temporal region corresponding to where that event occurs.
Gist of Idea
An event is a property of a unique space-time region
Source
David Lewis (Events [1986], II)
Book Reference
Lewis,David: 'Philosophical Papers Vol.2' [OUP 1986], p.245
A Reaction
[I've run together two separate bits, on p.244 and 245] Lewis cites Montague's similar view, that events are properties of times.