Under federal law as it exists on July 28, 2019, states are not permitted to observe daylight saving time year-round. If the United States congress amends federal law to authorize states to observe daylight saving time year-round, the legislature intends that Washington state make daylight saving time the permanent time of the state and all of its political subdivisions.
RCW 1.20.052
Permanent daylight saving time—Intent. (Contingent repeal.)
2019 c 297 s 1.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.