Okla. Stat. tit. 26, § 26-1-106: Determining dates

In determining the date of any event pertaining to elections

which date is fixed by statute as occurring a certain number of days

before or after an election, neither the day of the election nor the

day of the event shall be counted. If the date set by law for an

event pertaining to an election falls on an official holiday, the

Secretary of the State Election Board shall have the authority to

move the event to a preceding business day or to the next succeeding

business day as appropriate for completion of the event.