Business day.

RCW 46.04.079
in effect
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"Business day" means Monday through Friday and excludes Saturday, Sunday, and state and federal holidays. "Business day" means Monday through Friday and excludes Saturday, Sunday, and state and federal holidays.
Source: WA Statutes (Official Site)URL: https://app.leg.wa.gov/RCW/default.aspx?cite=46.04&full=trueFetched: 6/29/2026

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RCW 46.04.079 — Business day | Revised Code of Washington | Corpus