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February ( or or ) is the second month of the year in the Julian and Gregorian calendars. It is the shortest month and the only month with fewer than 30 days. The month has 28 days in common years or 29 days in leap years. February is the third month of meteorological winter in the Northern Hemisphere. In the Southern Hemisphere, February is the third month of summer (the seasonal equivalent of August in the Northern Hemisphere, in meteorological reckoning). ==History== The Roman month ''Februarius'' was named after the Latin term ''februum'', which means ''purification'', via the purification ritual ''Februa'' held on February 15 (full moon) in the old lunar Roman calendar. January and February were the last two months to be added to the Roman calendar, since the Romans originally considered winter a monthless period. They were added by Numa Pompilius about 713 BC. February remained the last month of the calendar year until the time of the decemvirs (c. 450 BC), when it became the second month. At certain intervals February was truncated to 23 or 24 days, and a 27-day intercalary month, Intercalaris, was inserted immediately after February to realign the year with the seasons. Under the reforms that instituted the Julian calendar, Intercalaris was abolished, leap years occurred regularly every fourth year, and in leap years February gained a 29th day. Thereafter, it remained the second month of the calendar year, meaning the order that months are displayed (January, February, March, ..., December) within a year-at-a-glance calendar. Even during the Middle Ages, when the numbered Anno Domini year began on March 25 or December 25, the second month was February whenever all twelve months were displayed in order. The Gregorian calendar reforms made slight changes to the system for determining which years were leap years and thus contained a 29-day February. Historical names for February include the Old English terms Solmonath (mud month) and Kale-monath (named for cabbage) as well as Charlemagne's designation Hornung. In Finnish, the month is called ''helmikuu'', meaning "month of the pearl"; when snow melts on tree branches, it forms droplets, and as these freeze again, they are like pearls of ice. In Polish and Ukrainian, respectively, the month is called ''luty'' or ''лютий'', meaning the month of ice or hard frost. In Macedonian the month is ''sechko'' (сечко), meaning month of cutting (). In Czech, it is called ''únor'', meaning month of submerging (river ice ). Croatians call the month ''veljača'', whose meaning is unknown but may come from the word for "greater," a possible reference to the days increasing in length. In Slovene, February is traditionally called ''svečan'', related to icicles or Candlemas. This name originates from ''sičan'', written as ''svičan'' in the ''New Carniolan Almanac'' from 1775 and changed to its final form by Franc Metelko in his ''New Almanac'' from 1824.〔 The name was also spelled ''sečan'', meaning "the month of cutting down of trees".〔 In 1848, a proposal was put forward in ''Kmetijske in rokodelske novice'' by the Slovene Society of Ljubljana to call this month ''talnik'' (related to ice melting), but it did not stick. The idea was proposed by the priest and patriot Blaž Potočnik. Another name of February in Slovene was ''vesnar'', after the mythological character Vesna. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「February」の詳細全文を読む スポンサード リンク
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