"opening date" in extended form

As we know, techicians have to open tickets sometimes, they have extended ticket form. When it opens, the "Opening date" is filled and contains the time when "create ticket" button was pressed.

And sometimes, filling the ticket may spend the time. So techincian have to correct the opening date field, otherwise the ticket can be overdued.

My offer is to add button "add with current time", which will correct time first then send ticket form to server/