>Daylight Saving Time always begins on the second Sunday of March and ends on the first Sunday of November.
This means that, on March 14, 2010, at 2:00 a.m. – you set the clocks ahead one hour.
History of Daylight Savings Time
Although not punctual in the modern sense, ancient civilizations adjusted daily schedules to the sun more flexibly than modern DST does, often dividing daylight into twelve equal hours regardless of day length, so that each daylight hour was longer during summer.[12] For example, Roman water clocks had different scales for different months of the year: at Rome’s latitude the third hour from sunrise, hora tertia, started by modern standards at 09:02 solar time and lasted 44 minutes at the winter solstice, but at the summer solstice it started at 06:58 and lasted 75 minutes.[13] After ancient times, equal-length civil hours eventually supplanted unequal, so civil time no longer varies by season. Unequal hours are still used in a few traditional settings, such as some Mount Athos monasteries[14] and some Jewish ceremonies.[15]
Benjamin Franklin suggested firing cannons at sunrise to waken Parisians.During his time as an American envoy to France, Benjamin Franklin, author of the proverb, “Early to bed, and early to rise, makes a man healthy, wealthy and wise”, anonymously published a letter suggesting that Parisians economize on candles by rising earlier to use morning sunlight.[16] This 1784 satire proposed taxing shutters, rationing candles, and waking the public by ringing church bells and firing cannons at sunrise.[17] Franklin did not propose DST; like ancient Rome, 18th-century Europe did not keep precise schedules. However, this soon changed as rail and communication networks came to require a standardization of time unknown in Franklin’s day.[18]
https://en.wikipedia.org/wiki/Daylight_saving_time
