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When in Italy, the change of winter time and daylight saving time made me confused. I always forget to adjust clocks in home and forget if I have done so. During the first few days after the change, I could not able to tell the time on clocks is correct or not. The idea of winter&summer time clock is to make the change visible and easy to make. Rotate the dial and the hour hand will move together. In winter time the SNOW would be put at the position of 12 o'clock, while in daylight saving time the SUN would be put as 12.