Summer time (Daylight Saving Time)

Due to daylight being longer in summer, for saving and fully use daylight, clocks are put forward one hour. Contrary, clocks are put backward one hour in winter as daylight is shorter. According the historical information, whenever summer time was being implemented, the government of Macao at that time would notify the public through public notices. Please find below the periods in which summer time was being enforced in Macao

Year	Periods	Publication
1946	30/4 ~ 1/12	Macao bulletin 17^th 3:961decree.
1947	19/4 ~ 30/12	Macao bulletin 16^th 4:153 decree
1948	2/5 ~ 29/10	Macao bulletin 18^th 4:374 decree
1949	--	--
1950	--	--
1951	31/3 ~ 29/10	Macao bulletin 12^th 4:946 decree and 43^th 5:025 decree, put forward and back-ward one hour.
1952	5/4 ~ 2/11	Macao bulletin 14^th 5:149 decree and 43^th 5:251 decree, put forward and back-ward one hour.
1953	4/4 ~ 31/10	Macao bulletin 13^th 5:366 decree and 44^th 5:444 decree, put forward and back-ward one hour.
1954	20/3 ~ 30/10	Macao bulletin 12^th 5:540 decree and 44^th 5:589 decree, put forward and back-ward one hour.
1955	19/3 ~ 5/11	Macao bulletin 12^th 5:676 decree and 45^th 5:739 decree, put forward and back-ward one hour.
1956	18/3 ~ 4/11	Macao bulletin 11^th 5:823 decree and 44^th 5:891 decree, put forward and back-ward one hour.
1957	24/3 ~ 3/11	Macao bulletin 12^th 5:981 decree and 43^th 6:064 decree, put forward and back-ward one hour.
1958	23/3 ~ 4/11	Macao bulletin 12^th 6:172 decree and 43^th 6:243 decree, put forward and back-ward one hour.
1959	22/3 ~ 1/11	Macao bulletin 12^th 6:342 decree and 43^th 6:411 decree, put forward and back-ward one hour.
1960	20/3 ~6/11	Macao bulletin 11^th 6:514 decree and 44^th 6:584 decree, put forward and back-ward one hour.
1961	19/3 ~ 5/11	Macao bulletin 10^th 6:721 decree and 43^th 6:815 decree, put forward and back-ward one hour.
1962	18/3 ~ 3/11	Macao bulletin 10^th 6:947 decree and 43^th 7:080 decree, put forward and back-ward one hour.
1963	24/3 ~ 3/11	Macao bulletin 12^th 7:218 decree and 43^th 7:340 decree, put forward and back-ward one hour.
1964	22/3 ~1/11	Macao bulletin 11^th 7:491 decree and 44^th 7:664 decree, put forward and back-ward one hour.
1965	18/4 ~17/10	Macao bulletin 15^th 7:846 decree and 42^th 7:979 decree, put forward and back-ward one hour.
1966	17/4 ~22/10	Macao bulletin 15^th 8:146 decree and 41^th 8:252 decree, put forward and back-ward one hour.
1967	16/4 ~ 22/10	Macao bulletin 15^th 8:429 decree and 41^th 8:540 decree, put forward and back-ward one hour.
1968	21/4 ~ 20/10	Macao bulletin 15^th 8:735 decree and 41^th 8:860 decree, put forward and back-ward one hour.
1969	20/4 ~ 19/10	Macao bulletin 16^th 9035 decree and 42^th 9156 decree, put forward and back-ward one hour.
1970	19/4 ~ 18/10	Macao bulletin 15^th 9328 decree and 41^th 9418 decree, put forward and back-ward one hour.
1971	18/4 ~ 17/10	Macao bulletin 14^th 9587 decree and 41^th 9702 decree, put forward and back-ward one hour.
1972	16/4 ~ 22/10	Macao bulletin 14^th 38/72 decree and 41^th 126/72 decree, put forward and back-ward one hour.
1973	22/4 ~ 21/10	Macao bulletin 14^th 61/73 decree and 40^th 182/73 decree, put forward and back-ward one hour.
1974	24/3 ~ 20/10	Macao bulletin 51^th282/73 decree and 41^th 177/74 decree, put forward and back-ward one hour.
1975	20/4 ~ 10/10	Macao bulletin 15^th 51/75 decree and 41^th 173/75 decree, put forward and back-ward one hour.
1976	18/4 ~ 17/10	Macao bulletin 14^th 67/76 decree and 41^th 169/76 decree, put forward and back-ward one hour.
1977	Nil
1978	Nil
1979	13/5 ~ 21/10	Macao bulletin 19^th 78/79 decree and 42^th 166/79 decree, put forward and back-ward one hour.
1980 ~ 2003	Nil