Event Length Meaning (after edit recurring events)

Hello guys,

after creating a recurring event with 1800 seconds in event_length (visible in db) and dragging one of them, it creates an additional line in db with a new ID plus an event_length with a strange number like this: 1434772500. What does it mean?

Thanks
Tiago Pereira

1434772500 - it is a timestamp of original start_date

The extra record basically says that event from Sat Jun 20 2015 ( obj.event_length ) must occur now at obj.start_date