Yet another list of urban myth and legend
From the page: 3 Wonder why you have to set your clock ahead in March? Daylight Saving Time began as a joke by Benjamin Franklin, who proposed waking people earlier on bright summer mornings so they might work more during the day and thus save candles. It was introduced in the U.K. in 1917 and then spread. WRONG!
BST began on the 21st May, 1916 and followed German adoption of the system which was proposed by William Willett in 1907.