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the claim

All US states observe daylight saving time.

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 4 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that all US states observe daylight saving time?

No. Reference sources state that Hawaii has never observed daylight saving time and that Arizona's clocks do not change, so not all US states observe DST.

Verdict: REFUTED · 0 sources for, 4 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence against · 4
Daylight saving time in the United States
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Daylight saving time in the United States. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Daylight_saving_time_in_the_United_States

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More against · 3
Analysis of daylight saving time
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Analysis of daylight saving time. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Analysis_of_daylight_saving_time

Why Arizona and Hawaii Don’t Observe Daylight Saving Time | HISTORY
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Why Arizona and Hawaii Don’t Observe Daylight Saving Time | HISTORY. (n.d.). history.com. https://www.history.com/articles/states-without-daylight-savings-time

Daylight saving time: an American Academy of Sleep Medicine position statement.
2020
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MA, R., O, A., JH, B. P., M, B., J, D., EE, F., V, S., SS, S., R, U., K, Y., F, A., RN, A., KA, C., DB, K., DA, K., RK, M., JL, M., EJ, O., K, R., & CL, R. (2020). Daylight saving time: an American Academy of Sleep Medicine position statement.. doi.org. https://doi.org/10.5664/jcsm.8780

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