SqlDateTime overflow when updating data

Got this error while trying to update event.

“SqlDateTime overflow. Must be between 1/1/1753 12:00:00 AM and 12/31/9999 11:59:59 PM.”

What is this error?

Discovered that additional datetime fields with null value in the db is causing the problem. But i need the additional datetime fields for later use. How can i fix this?

Could you get your dates on the server side or it possibly even don’t send to the server?
It would be nice if you’ll show your example.