Atlantic/Reykjavik

Time zone identifier: Atlantic/Reykjavik

Current civil offset: +00:00 (GMT)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1908-01-01

Local Mean Time (LMT): -01:28 based on geographic meridian

Total recorded transitions: 68 transitions across 3 distinct offsets

Associated countries: IS

Aliases (Link targets): Iceland

Historical Offset Step Chart (1880 to Present)

Text summary: Atlantic/Reykjavik shifted between 3 distinct offsets from 1908-01-01 through the modern era.

Complete Transition History (68 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1908-01-01T01:28:00Z`	`1908-01-01 00:28:00`	-01:28 → -01:00	`-01`	No	gap
`1917-02-20T00:00:00Z`	`1917-02-20 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1917-10-21T01:00:00Z`	`1917-10-21 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1918-02-20T00:00:00Z`	`1918-02-20 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1918-11-16T01:00:00Z`	`1918-11-16 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1919-02-20T00:00:00Z`	`1919-02-20 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1919-11-16T01:00:00Z`	`1919-11-16 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1921-03-20T00:00:00Z`	`1921-03-20 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1921-06-23T01:00:00Z`	`1921-06-23 00:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1939-04-30T00:00:00Z`	`1939-04-30 00:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1939-10-29T02:00:00Z`	`1939-10-29 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1940-02-25T03:00:00Z`	`1940-02-25 03:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1940-11-03T02:00:00Z`	`1940-11-03 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1941-03-02T02:00:00Z`	`1941-03-02 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1941-11-02T02:00:00Z`	`1941-11-02 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1942-03-08T02:00:00Z`	`1942-03-08 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1942-10-25T02:00:00Z`	`1942-10-25 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1943-03-07T02:00:00Z`	`1943-03-07 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1943-10-24T02:00:00Z`	`1943-10-24 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1944-03-05T02:00:00Z`	`1944-03-05 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1944-10-22T02:00:00Z`	`1944-10-22 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1945-03-04T02:00:00Z`	`1945-03-04 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1945-10-28T02:00:00Z`	`1945-10-28 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1946-03-03T02:00:00Z`	`1946-03-03 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1946-10-27T02:00:00Z`	`1946-10-27 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1947-04-06T02:00:00Z`	`1947-04-06 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1947-10-26T02:00:00Z`	`1947-10-26 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1948-04-04T02:00:00Z`	`1948-04-04 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1948-10-24T02:00:00Z`	`1948-10-24 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1949-04-03T02:00:00Z`	`1949-04-03 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1949-10-30T02:00:00Z`	`1949-10-30 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1950-04-02T02:00:00Z`	`1950-04-02 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1950-10-22T02:00:00Z`	`1950-10-22 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1951-04-01T02:00:00Z`	`1951-04-01 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1951-10-28T02:00:00Z`	`1951-10-28 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1952-04-06T02:00:00Z`	`1952-04-06 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1952-10-26T02:00:00Z`	`1952-10-26 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1953-04-05T02:00:00Z`	`1953-04-05 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1953-10-25T02:00:00Z`	`1953-10-25 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1954-04-04T02:00:00Z`	`1954-04-04 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1954-10-24T02:00:00Z`	`1954-10-24 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1955-04-03T02:00:00Z`	`1955-04-03 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1955-10-23T02:00:00Z`	`1955-10-23 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1956-04-01T02:00:00Z`	`1956-04-01 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1956-10-28T02:00:00Z`	`1956-10-28 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1957-04-07T02:00:00Z`	`1957-04-07 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1957-10-27T02:00:00Z`	`1957-10-27 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1958-04-06T02:00:00Z`	`1958-04-06 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1958-10-26T02:00:00Z`	`1958-10-26 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1959-04-05T02:00:00Z`	`1959-04-05 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1959-10-25T02:00:00Z`	`1959-10-25 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1960-04-03T02:00:00Z`	`1960-04-03 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1960-10-23T02:00:00Z`	`1960-10-23 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1961-04-02T02:00:00Z`	`1961-04-02 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1961-10-22T02:00:00Z`	`1961-10-22 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1962-04-01T02:00:00Z`	`1962-04-01 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1962-10-28T02:00:00Z`	`1962-10-28 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1963-04-07T02:00:00Z`	`1963-04-07 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1963-10-27T02:00:00Z`	`1963-10-27 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1964-04-05T02:00:00Z`	`1964-04-05 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1964-10-25T02:00:00Z`	`1964-10-25 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1965-04-04T02:00:00Z`	`1965-04-04 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1965-10-24T02:00:00Z`	`1965-10-24 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1966-04-03T02:00:00Z`	`1966-04-03 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1966-10-23T02:00:00Z`	`1966-10-23 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1967-04-02T02:00:00Z`	`1967-04-02 02:00:00`	-01:00 → +00:00	`+00`	Yes	gap
`1967-10-29T02:00:00Z`	`1967-10-29 01:00:00`	+00:00 → -01:00	`-01`	No	overlap
`1968-04-07T02:00:00Z`	`1968-04-07 02:00:00`	-01:00 → +00:00	`GMT`	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.