At 4 a.m. on Sunday, October 25, clocks are due to go back an hour.

The idea of putting clocks back was first thought of by William Willett in 1907, but he failed to see it first implemented in 1916 as he died a year earlier. The idea was to implement the change so as to reduce England’s coal usage by cutting down the number of working hours in darkness.

In Athens, Daylight Saving doesn’t necessarily occur at the same time each year but clocks usually go forward by one hour in March and back an hour in October.