Did you set your clock forward for daylight savings time ?   What ? Why do we have to do that ?   Well , at the start of the spring we usually have more daylight in the mornings and less in the afternoon . This is basically due to our position on the planet and the rotation of the earth . In any case , to take better advantage of the daylight available , we compensate by moving our clocks forward one hour .   I see . That ’ s convenient ! I never understood things like this , such as GMT . I never know what time zone we are in or when to change my clock ! 