RCW 65.16.100: Omissions for Sundays and holidays.

Where any law or ordinance of any incorporated city or town in this state provides for the publication of any form of notice or advertisement for consecutive days in a daily newspaper, the publication of such notice on legal holidays and Sundays may be omitted without in any manner affecting the legality of such notice or advertisement: PROVIDED, That the publication of the required number of notices is complied with.