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Table 3.
Historical periods when the DST was in effect in Los Angeles, California (years after MWO adopted the UT timing practice are not included).
| Years | Start date | End date | Note |
|---|---|---|---|
| 1918–1919 | 31 Mar. | 27 Oct. | Introduced by “Standard Time Act of March 19, 1918” |
| abolished by 66th U.S. Congress in “CHAP. 51. | |||
| An Act for the repeal of the daylight-saving law” | |||
| 1942–1945 | 9 Feb. 1942 | 30 Sep. 1945 | year-round DST by Public Law 403 “Daylight Savings Time” |
| 1949–1966 | Last Sunday in Apr. | last Sunday in Sep. | DAYLIGHT SAVING TIME California Proposition 12 (1949) |
| 1967–1972 | Last Sunday in Apr. | last Sunday in Oct. | U.S. Uniform Time Act of 1966 |
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