| Year : 1978 |
|---|
| Transition to daylight saving time on Sunday 12 November 1978 - 10 h 30 (GMT - 9 h 30) CKHST |
| Year : 1979 |
|---|
| Back to standard time on Sunday 4 March 1979 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 28 October 1979 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1980 |
|---|
| Back to standard time on Sunday 2 March 1980 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 26 October 1980 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1981 |
|---|
| Back to standard time on Sunday 1 March 1981 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 25 October 1981 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1982 |
|---|
| Back to standard time on Sunday 7 March 1982 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 31 October 1982 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1983 |
|---|
| Back to standard time on Sunday 6 March 1983 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 30 October 1983 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1984 |
|---|
| Back to standard time on Sunday 4 March 1984 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 28 October 1984 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1985 |
|---|
| Back to standard time on Sunday 3 March 1985 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 27 October 1985 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1986 |
|---|
| Back to standard time on Sunday 2 March 1986 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 26 October 1986 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1987 |
|---|
| Back to standard time on Sunday 1 March 1987 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 25 October 1987 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1988 |
|---|
| Back to standard time on Sunday 6 March 1988 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 30 October 1988 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1989 |
|---|
| Back to standard time on Sunday 5 March 1989 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 29 October 1989 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1990 |
|---|
| Back to standard time on Sunday 4 March 1990 - 09 h 30 (GMT - 10 h ) CKT |
| Transition to daylight saving time on Sunday 28 October 1990 - 10 h 00 (GMT - 9 h 30) CKHST |
| Year : 1991 |
|---|
| Back to standard time on Sunday 3 March 1991 - 09 h 30 (GMT - 10 h ) CKT |