Saint-Barthélemy and Saint-Martin do not observe Daylight Saving Time. Haiti Haiti had reestablished Daylight Saving Time in 2012, following the US/Canada DST Rules, starting on the second Sunday in March and ending on the first Sunday in November. This was discontinued in 2016, but was re-introduced in 2017. Jamaica Jamaica previously used Daylight Saving Time, utilising the US and Canadian rules. The practice was followed from 1974 before being discontinued in 1983. Trinidad and Tobago Trinidad and Tobago remains on Atlantic Standard Time and does not observe DST. The Turks and Caicos Islands Turks and Caicos discontinued Daylight Saving Time in March 2015, at the same time moving from the Eastern Time Zone to the Atlantic Time Zone, the result being the same as having year-round Daylight Saving in the Eastern Time Zone. In 2018, the islands reintroduced daylight saving time by setting the clocks back 1 hour to Eastern Standard Time; the islands follow the same daylight saving schedule as the United States and Canada. Central America Guatemala Guatemala has used DST during energy crises. The last time the country used DST was from 30 April to 1 October 2006. Honduras Honduras adopted DST from May 1994 until September 1994 but then abandoned it. On 7 May 2006 it again used DST; however the country ended DST observance on 7 August 2006, making this the shortest use of DST in the northern hemisphere as it was only applied for 3 months. The government decided not to use DST in 2007. Nicaragua Nicaragua observed DST from 1 January 1992 until 20 February 1994 but it stopped thereafter. DST was re-implemented, citing energy conservation, beginning 10 April 2005 until 2 October 2005 and followed a similar period the next year. 2006's observance of DST began on 30 April and ended on 1 October. In 2007, the government of Nicaragua decided to stop observing daylight saving time. South America In equatorial regions, DST is not useful because of the stability of light levels throughout the year. As a result, large areas of South America do not observe DST. DST is used in some of the more southerly countries such as Paraguay and most of Chile. These countries or regions in South America do not use daylight saving time: Argentina Bolivia Brazil Colombia Ecuador French Guiana Guyana Peru Suriname Uruguay Venezuela Argentina Since 2009, Argentina has not been observing DST and the entire