Neb. Rev. Stat. § 25-2227

Wherever the statutes of Nebraska provide for the publication of notices any number of weeks, or for any number of weeks, the term week shall be construed to mean either a period of time known as a calendar week beginning on Sunday and ending with Saturday, or any period of seven consecutive days beginning with the date of the first publication of notice; Provided, however, nothing herein contained shall be held to apply to any notice published prior to April 17, 1915.