Liberia first adopted the UTC offset-0:43:08 (called Liberia Mean Time; LMT) as it was the geographical central meridian on which the capital Monrovia was located.[5] The time zone was renamed to Monrovia Mean Time in 1882.[5] In March 1919, the offset was redefined forward by 1 minute and 22 seconds to -0:44:30.[6][7] Liberia adopted Greenwich Mean Time (GMT; UTC+00:00) on 7 January 1972.[8]
^Shanks, Thomas G. (1 July 1999) The International Atlas: World Longitudes & Latitudes, Time Changes and Time Zones. (5th edition). ACS Publications. Retrieved 26 July 2021.[page needed]
^Tolbert, William R. (1972). Republic of Liberia presidential papers: documents, diary and record of activities of the Chief Executive, July 23, 1971-July 31, 1972. Monrovia, R.L. [i.e. Republic of Liberia]: Executive Mansion. p. 330. Retrieved 26 July 2021.