America/Swift_Current

Time zone identifier: America/Swift_Current

Current civil offset: -06:00 (CST)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1905-09-01

Local Mean Time (LMT): -07:11:20 based on geographic meridian

Total recorded transitions: 23 transitions across 3 distinct offsets

Associated countries: CA

Historical Offset Step Chart (1880 to Present)

Text summary: America/Swift_Current shifted between 3 distinct offsets from 1905-09-01 through the modern era.

Complete Transition History (23 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1905-09-01T07:11:20Z`	`1905-09-01 00:11:20`	-07:11:20 → -07:00	`MST`	No	gap
`1918-04-14T09:00:00Z`	`1918-04-14 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1918-10-27T08:00:00Z`	`1918-10-27 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1942-02-09T09:00:00Z`	`1942-02-09 03:00:00`	-07:00 → -06:00	`MWT`	Yes	gap
`1945-08-14T23:00:00Z`	`1945-08-14 17:00:00`	-06:00 → -06:00	`MPT`	Yes	offset-only
`1945-09-30T08:00:00Z`	`1945-09-30 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1946-04-28T09:00:00Z`	`1946-04-28 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1946-10-13T08:00:00Z`	`1946-10-13 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1947-04-27T09:00:00Z`	`1947-04-27 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1947-09-28T08:00:00Z`	`1947-09-28 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1948-04-25T09:00:00Z`	`1948-04-25 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1948-09-26T08:00:00Z`	`1948-09-26 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1949-04-24T09:00:00Z`	`1949-04-24 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1949-09-25T08:00:00Z`	`1949-09-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1957-04-28T09:00:00Z`	`1957-04-28 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1957-10-27T08:00:00Z`	`1957-10-27 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1959-04-26T09:00:00Z`	`1959-04-26 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1959-10-25T08:00:00Z`	`1959-10-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1960-04-24T09:00:00Z`	`1960-04-24 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1960-09-25T08:00:00Z`	`1960-09-25 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1961-04-30T09:00:00Z`	`1961-04-30 03:00:00`	-07:00 → -06:00	`MDT`	Yes	gap
`1961-09-24T08:00:00Z`	`1961-09-24 01:00:00`	-06:00 → -07:00	`MST`	No	overlap
`1972-04-30T09:00:00Z`	`1972-04-30 03:00:00`	-07:00 → -06:00	`CST`	No	gap

Years on Record

Methodology Note: The 1970 Rule

tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.