See Month lengths.
February starts on the same day of the week as both March and November in common years, and August in leap years.
Having only 28 days in common years, it is the only month of the calendar that once every six years and twice every 11 years, will have only four full 7-day weeks where the first day of the month starts on a Sunday and the last day ends on a Saturday. This pattern can be observed in 2009 and can be traced back 11 years to 1998, another 11 years back to 1987, and 6 years back to 1981; and so on twice 11 years consecutively and once six years either forward into the future or back into the past, unless the pattern is broken by a skipped leap year, but no leap year has been skipped since 1900 and no others will be skipped until 2100. A year of this kind would be a common year starting on Thursday.
February was named after the Latin term februum, which means purification, via the purification ritual Februa held on February 15 in the old 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 700 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 Roman priests truncated February to 23 or 24 days and inserted a 27-day intercalary month, Intercalaris, after February to realign the year with the seasons. See from Roman to Julian. 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, February continued to be the second month whenever all twelve months were displayed in order.
Historical names for February include the Anglo-Saxon terms Solmoneth (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.
Many people pronounce the 'u' of "February" as you rather than /uː/ oo, by analogy with "January", which forces the first 'r' to be eclipsed, viz. /ˈfɛbjuːɛri/ FEB-yoo-air-ee rather than /ˈfɛbruːəri/ FEB-roo-uh-ree. Otherwise, the flanking mid vowel ('e') and back vowel ('u'), combined with the final -ry syllable (front vowel 'ee') make the 'br' difficult for Anglophones to pronounce in the first place. The problem does not usually arise for Scotiaphones, however. The Scots language names for the month are Feberwary and Februar, the latter usually pronounced with a long "ay" vowel in the first syllable.