Section 3--109. Definite Time.

(1) An instrument is payable at a definite time if by its terms it is
payable

(a) on or before a stated date or at a fixed period after a

stated date; or

(b) at a fixed period after sight; or

(c) at a definite time subject to any acceleration; or

(d) at a definite time subject to extension at the option of the

holder, or to extension to a further definite time at the

option of the maker or acceptor or automatically upon or

after a specified act or event.

(2) An instrument which by its terms is otherwise payable only upon an
act or event uncertain as to time of occurrence is not payable at a
definite time even though the act or event has occurred.