America/Kentucky/Monticello

Time zone identifier: America/Kentucky/Monticello

Current civil offset: -05:00 (EST)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1883-11-18

Local Mean Time (LMT): -05:39:24 based on geographic meridian

Total recorded transitions: 148 transitions across 4 distinct offsets

Associated countries: US

Historical Offset Step Chart (1880 to Present)

Text summary: America/Kentucky/Monticello shifted between 4 distinct offsets from 1883-11-18 through the modern era.

Complete Transition History (148 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1883-11-18T18:00:00Z`	`1883-11-18 12:00:00`	-05:39:24 → -06:00	`CST`	No	overlap
`1918-03-31T08:00:00Z`	`1918-03-31 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1918-10-27T07:00:00Z`	`1918-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1919-03-30T08:00:00Z`	`1919-03-30 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1919-10-26T07:00:00Z`	`1919-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1942-02-09T08:00:00Z`	`1942-02-09 03:00:00`	-06:00 → -05:00	`CWT`	Yes	gap
`1945-08-14T23:00:00Z`	`1945-08-14 18:00:00`	-05:00 → -05:00	`CPT`	Yes	offset-only
`1945-09-30T07:00:00Z`	`1945-09-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1968-04-28T08:00:00Z`	`1968-04-28 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1968-10-27T07:00:00Z`	`1968-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1969-04-27T08:00:00Z`	`1969-04-27 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1969-10-26T07:00:00Z`	`1969-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1970-04-26T08:00:00Z`	`1970-04-26 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1970-10-25T07:00:00Z`	`1970-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1971-04-25T08:00:00Z`	`1971-04-25 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1971-10-31T07:00:00Z`	`1971-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1972-04-30T08:00:00Z`	`1972-04-30 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1972-10-29T07:00:00Z`	`1972-10-29 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1973-04-29T08:00:00Z`	`1973-04-29 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1973-10-28T07:00:00Z`	`1973-10-28 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1974-01-06T08:00:00Z`	`1974-01-06 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1974-10-27T07:00:00Z`	`1974-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1975-02-23T08:00:00Z`	`1975-02-23 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1975-10-26T07:00:00Z`	`1975-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1976-04-25T08:00:00Z`	`1976-04-25 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1976-10-31T07:00:00Z`	`1976-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1977-04-24T08:00:00Z`	`1977-04-24 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1977-10-30T07:00:00Z`	`1977-10-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1978-04-30T08:00:00Z`	`1978-04-30 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1978-10-29T07:00:00Z`	`1978-10-29 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1979-04-29T08:00:00Z`	`1979-04-29 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1979-10-28T07:00:00Z`	`1979-10-28 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1980-04-27T08:00:00Z`	`1980-04-27 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1980-10-26T07:00:00Z`	`1980-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1981-04-26T08:00:00Z`	`1981-04-26 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1981-10-25T07:00:00Z`	`1981-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1982-04-25T08:00:00Z`	`1982-04-25 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1982-10-31T07:00:00Z`	`1982-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1983-04-24T08:00:00Z`	`1983-04-24 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1983-10-30T07:00:00Z`	`1983-10-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1984-04-29T08:00:00Z`	`1984-04-29 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1984-10-28T07:00:00Z`	`1984-10-28 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1985-04-28T08:00:00Z`	`1985-04-28 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1985-10-27T07:00:00Z`	`1985-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1986-04-27T08:00:00Z`	`1986-04-27 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1986-10-26T07:00:00Z`	`1986-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1987-04-05T08:00:00Z`	`1987-04-05 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1987-10-25T07:00:00Z`	`1987-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1988-04-03T08:00:00Z`	`1988-04-03 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1988-10-30T07:00:00Z`	`1988-10-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1989-04-02T08:00:00Z`	`1989-04-02 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1989-10-29T07:00:00Z`	`1989-10-29 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1990-04-01T08:00:00Z`	`1990-04-01 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1990-10-28T07:00:00Z`	`1990-10-28 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1991-04-07T08:00:00Z`	`1991-04-07 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1991-10-27T07:00:00Z`	`1991-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1992-04-05T08:00:00Z`	`1992-04-05 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1992-10-25T07:00:00Z`	`1992-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1993-04-04T08:00:00Z`	`1993-04-04 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1993-10-31T07:00:00Z`	`1993-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1994-04-03T08:00:00Z`	`1994-04-03 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1994-10-30T07:00:00Z`	`1994-10-30 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1995-04-02T08:00:00Z`	`1995-04-02 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1995-10-29T07:00:00Z`	`1995-10-29 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1996-04-07T08:00:00Z`	`1996-04-07 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1996-10-27T07:00:00Z`	`1996-10-27 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1997-04-06T08:00:00Z`	`1997-04-06 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1997-10-26T07:00:00Z`	`1997-10-26 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1998-04-05T08:00:00Z`	`1998-04-05 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1998-10-25T07:00:00Z`	`1998-10-25 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`1999-04-04T08:00:00Z`	`1999-04-04 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`1999-10-31T07:00:00Z`	`1999-10-31 01:00:00`	-05:00 → -06:00	`CST`	No	overlap
`2000-04-02T08:00:00Z`	`2000-04-02 03:00:00`	-06:00 → -05:00	`CDT`	Yes	gap
`2000-10-29T07:00:00Z`	`2000-10-29 02:00:00`	-05:00 → -05:00	`EST`	No	offset-only
`2001-04-01T07:00:00Z`	`2001-04-01 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2001-10-28T06:00:00Z`	`2001-10-28 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2002-04-07T07:00:00Z`	`2002-04-07 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2002-10-27T06:00:00Z`	`2002-10-27 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2003-04-06T07:00:00Z`	`2003-04-06 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2003-10-26T06:00:00Z`	`2003-10-26 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2004-04-04T07:00:00Z`	`2004-04-04 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2004-10-31T06:00:00Z`	`2004-10-31 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2005-04-03T07:00:00Z`	`2005-04-03 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2005-10-30T06:00:00Z`	`2005-10-30 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2006-04-02T07:00:00Z`	`2006-04-02 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2006-10-29T06:00:00Z`	`2006-10-29 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2007-03-11T07:00:00Z`	`2007-03-11 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2007-11-04T06:00:00Z`	`2007-11-04 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2008-03-09T07:00:00Z`	`2008-03-09 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2008-11-02T06:00:00Z`	`2008-11-02 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2009-03-08T07:00:00Z`	`2009-03-08 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2009-11-01T06:00:00Z`	`2009-11-01 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2010-03-14T07:00:00Z`	`2010-03-14 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2010-11-07T06:00:00Z`	`2010-11-07 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2011-03-13T07:00:00Z`	`2011-03-13 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2011-11-06T06:00:00Z`	`2011-11-06 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2012-03-11T07:00:00Z`	`2012-03-11 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2012-11-04T06:00:00Z`	`2012-11-04 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2013-03-10T07:00:00Z`	`2013-03-10 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2013-11-03T06:00:00Z`	`2013-11-03 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2014-03-09T07:00:00Z`	`2014-03-09 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2014-11-02T06:00:00Z`	`2014-11-02 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2015-03-08T07:00:00Z`	`2015-03-08 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2015-11-01T06:00:00Z`	`2015-11-01 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2016-03-13T07:00:00Z`	`2016-03-13 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2016-11-06T06:00:00Z`	`2016-11-06 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2017-03-12T07:00:00Z`	`2017-03-12 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2017-11-05T06:00:00Z`	`2017-11-05 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2018-03-11T07:00:00Z`	`2018-03-11 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2018-11-04T06:00:00Z`	`2018-11-04 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2019-03-10T07:00:00Z`	`2019-03-10 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2019-11-03T06:00:00Z`	`2019-11-03 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2020-03-08T07:00:00Z`	`2020-03-08 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2020-11-01T06:00:00Z`	`2020-11-01 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2021-03-14T07:00:00Z`	`2021-03-14 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2021-11-07T06:00:00Z`	`2021-11-07 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2022-03-13T07:00:00Z`	`2022-03-13 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2022-11-06T06:00:00Z`	`2022-11-06 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2023-03-12T07:00:00Z`	`2023-03-12 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2023-11-05T06:00:00Z`	`2023-11-05 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2024-03-10T07:00:00Z`	`2024-03-10 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2024-11-03T06:00:00Z`	`2024-11-03 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2025-03-09T07:00:00Z`	`2025-03-09 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2025-11-02T06:00:00Z`	`2025-11-02 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2026-03-08T07:00:00Z`	`2026-03-08 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2026-11-01T06:00:00Z`	`2026-11-01 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2027-03-14T07:00:00Z`	`2027-03-14 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2027-11-07T06:00:00Z`	`2027-11-07 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2028-03-12T07:00:00Z`	`2028-03-12 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2028-11-05T06:00:00Z`	`2028-11-05 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2029-03-11T07:00:00Z`	`2029-03-11 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2029-11-04T06:00:00Z`	`2029-11-04 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2030-03-10T07:00:00Z`	`2030-03-10 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2030-11-03T06:00:00Z`	`2030-11-03 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2031-03-09T07:00:00Z`	`2031-03-09 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2031-11-02T06:00:00Z`	`2031-11-02 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2032-03-14T07:00:00Z`	`2032-03-14 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2032-11-07T06:00:00Z`	`2032-11-07 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2033-03-13T07:00:00Z`	`2033-03-13 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2033-11-06T06:00:00Z`	`2033-11-06 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2034-03-12T07:00:00Z`	`2034-03-12 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2034-11-05T06:00:00Z`	`2034-11-05 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2035-03-11T07:00:00Z`	`2035-03-11 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2035-11-04T06:00:00Z`	`2035-11-04 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2036-03-09T07:00:00Z`	`2036-03-09 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2036-11-02T06:00:00Z`	`2036-11-02 01:00:00`	-04:00 → -05:00	`EST`	No	overlap
`2037-03-08T07:00:00Z`	`2037-03-08 03:00:00`	-05:00 → -04:00	`EDT`	Yes	gap
`2037-11-01T06:00:00Z`	`2037-11-01 01:00:00`	-04:00 → -05:00	`EST`	No	overlap

Notes from the Maintainers

Source: northamerica (Lines 1096 to 1120)

Wayne County, Kentucky

From Lake Cumberland LIFE
http://www.lake-cumberland.com/life/archive/news990129time.shtml
(1999-01-29) via WKYM-101.7:
Clinton County has joined Wayne County in asking the DoT to change from
the Central to the Eastern time zone....  The Wayne County government made
the same request in December.  And while Russell County officials have not
taken action, the majority of respondents to a poll conducted there in
August indicated they would like to change to "fast time" also.
The three Lake Cumberland counties are the farthest east of any U.S.
location in the Central time zone.

From Rich Wales (2000-08-29):
After prolonged debate, and despite continuing deep differences of opinion,
Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
(-0500) time.  They won't "fall back" this year.  See Sara Shipley,
The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).

From Paul Eggert (2001-07-16):
The final rule was published in the
Federal Register 65, 160 (2000-08-17), pp 50154-50158.
https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm

Attributed Statements:

Rich Wales (2000-08-29):

After prolonged debate, and despite continuing deep differences of opinion, Wayne County (central Kentucky) is switching from Central (-0600) to Eastern (-0500) time. They won't "fall back" this year. See Sara Shipley, The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).

Paul Eggert (2001-07-16):

The final rule was published in the Federal Register 65, 160 (2000-08-17), pp 50154-50158. https://www.gpo.gov/fdsys/pkg/FR-2000-08-17/html/00-20854.htm

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.