make/data/tzdata/africa

@@ -179,11 +179,10 @@
 Link Africa/Abidjan Africa/Dakar        # Senegal
 Link Africa/Abidjan Africa/Freetown     # Sierra Leone
 Link Africa/Abidjan Africa/Lome         # Togo
 Link Africa/Abidjan Africa/Nouakchott   # Mauritania
 Link Africa/Abidjan Africa/Ouagadougou  # Burkina Faso
-Link Africa/Abidjan Africa/Sao_Tome     # São Tomé and Príncipe
 Link Africa/Abidjan Atlantic/St_Helena  # St Helena
 
 # Djibouti
 # See Africa/Nairobi.
 

@@ -446,11 +445,11 @@
 #
 # From Paul Eggert (2017-03-02):
 #
 # The Nautical Almanac for the Year 1970, p 264, is the source for -0:44:30.
 #
-# In 1972 Liberia was the last country to switch from a UTC offset
+# In 1972 Liberia was the last country to switch from a UT offset
 # that was not a multiple of 15 or 20 minutes.  The 1972 change was on
 # 1972-01-07, according to an entry dated 1972-01-04 on p 330 of:
 # Presidential Papers: First year of the administration of
 # President William R. Tolbert, Jr., July 23, 1971-July 31, 1972.
 # Monrovia: Executive Mansion.

@@ -1058,10 +1057,23 @@
 #       Gough (scientific station since 1955; sealers wintered previously):
 #               on GMT, says the CIA
 #       Inaccessible, Nightingale: uninhabited
 
 # São Tomé and Príncipe
+
+# From Steffen Thorsen (2018-01-08):
+# Multiple sources tell that São Tomé changed from UTC to UTC+1 as
+# they entered the year 2018.
+# From Michael Deckers (2018-01-08):
+# the switch is from 01:00 to 02:00 ... [Decree No. 25/2017]
+# http://www.mnec.gov.st/index.php/publicacoes/documentos/file/90-decreto-lei-n-25-2017
+
+Zone    Africa/Sao_Tome  0:26:56 -      LMT     1884
+                        -0:36:45 -      LMT     1912 # Lisbon Mean Time
+                         0:00   -       GMT     2018 Jan  1 01:00
+                         1:00   -       WAT
+
 # Senegal
 # See Africa/Abidjan.
 
 # Seychelles
 # Zone  NAME            GMTOFF  RULES   FORMAT  [UNTIL]