Reuters Diary of Time Changes Around the World; *** DATE AS PER GMT *** SATURDAY, JANUARY 21 FIJI - Clocks go back by one hour to GMT+12 SUNDAY, FEBRUARY 26 BRAZIL - Clocks go back by one hour to GMT-3 in Brasilia, Rio de Janeiro, Sao Paulo, Salvador and GMT-4 in Campo Grande. SUNDAY, MARCH 11 URUGUAY - Clocks go back by one hour to GMT-3 SAINT-PIERRE and MIQUELON - Clocks go forward one hour to GMT-2 CANADA - Most of Canada puts clocks forwar