In Ontario, Daylight Savings begins on the second Sunday of March and ends on the first Sunday of November. During these months, Rwanda is six hours ahead of Ontario, so if the time is 14:00 (2:00) in Ontario, the time is 20:00 (8:00) in Rwanda. During Daylight Savings, Ontario is -4 hours from GMT time, and Rwanda is +2 hours.
Because Ontario is west of Rwanda, if you wish to calculate the time in Ontario based on the time in Rwanda, you will have to subtract six hours. Thus if the time is 13:00 (1:00) in Rwanda, the time is 7:00 in Ontario.
Between the first Sunday in November and the second Sunday in March, Ontario reverts to its normal position in global time and thus returns to -5 hours from GMT. This means the time difference between the two places is seven hours. So at 14:00 (2:00) in Ontario, the time would be 21:00 (9:00) in Rwanda.
During the winter months, the time difference is seven hours, and if calculating Ontario time from Rwanda time, you must subtract seven hours. So if the time is 13:00 (1:00) in Rwanda, it is 06:00 (6:00) in Ontario.
