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Verizon reclaims US wireless stake for $130B

Verizon will own its wireless business outright after agreeing Monday to pay $130 billion for the 45 percent stake in Verizon Wireless owned by British cellphone carrier Vodafone.

Windows Phone gains amid Apple-Android clash

Windows-powered smartphones made strong gains in the US market in early 2013, capturing third place, with Android and Apple at the top, a survey showed Monday.

PC sales plunge as Windows 8 flops (Update 2)

Two somber new reports show unprecedented declines in desktop and laptop sales during the first three months of the year—signs that the personal computer market may never fully recover from a new generation of mobile devices.

Long-awaited Facebook IPO looms in New Year

Facebook co-founder and chief executive Mark Zuckerberg has deflected talk of going public for years but it looks like it is finally going to happen in 2012.

'Collapse' in semiconductor demand hits ASML

Dutch computer chip equipment maker ASML announced net losses for the first quarter after a collapse in sales, but said it saw signs of improving market conditions.

Blackberry Curve tops iPhone in first quarter: NPD

Research in Motion's Blackberry Curve moved past Apple's iPhone to become the top-selling smartphone in the United States in the first quarter of the year, research firm NPD Group reported Monday.

Verizon 1st-qtr profit, revenue beat expectations

(AP) -- Verizon Communications Inc. said Monday its earnings grew 5 percent in the first quarter, boosted by its acquisition of Alltel Corp. and strong demand for its wireless, Internet and TV services.

Yahoo's feeble 1Q triggers nearly 700 more layoffs

(AP) -- Yahoo Inc.'s first-quarter results tread familiar ground as the Internet company's financial erosion triggered another round of layoffs and management promised better days ahead.

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Calendar year

Generally speaking, a calendar year begins on the New Year's Day of the given calendar system and ends on the day before the following New Year's Day. By convention, a calendar year consists of a natural number of days. To reconcile the calendar year with an astronomical cycle (which could not possibly be reckoned in a whole number of days), certain years contain extra days. Through further insertion of non-day units of time, the calendar year can be further synchronized; however, these extra units of time are not considered part of the calendar.

The Gregorian year begins on January 1 and ends on December 31 with a length of 365 days in an ordinary year and 366 days in a leap year giving an average length of 365.2425 days. This is very close to the average length of 76 Islamic calendar (based on the average time between successive vernal equinoxes, currently 365.2424 days and increasing marginally). Other formula-based calendars can have lengths which are further out of step with the solar cycle, for example, the Julian calendar had an average length of 365.25 days, and the Hebrew calendar has an average length of 365.2468 days.

The astronomer's mean tropical year which is averaged over equinoxes and solstices is currently 365.24219 days, slightly shorter than the average length of the year in most calendars, but astronomer's value changes over time, so William Herschel's suggested correction to the Gregorian calendar may become unnecessary by the year 4000.

This text uses material from Wikipedia, licensed under CC BY-SA