Calendar year
hideGenerally 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.
For more information about Calendar year, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with first quarter
'Collapse' in semiconductor demand hits ASML
Jul 15, 2009 |
not rated yet |
0
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.
Internet ad revenue falls 5 pct in first quarter
Jun 05, 2009 |
not rated yet |
0
(AP) -- Internet advertising revenue is down 5 percent.
Dell profit falls 63 percent as PC sales stay soft
May 28, 2009 |
not rated yet |
0
(AP) -- Dell Inc. said Thursday its fiscal first-quarter profit fell 63 percent as the recession continued to crimp computer sales around the world.
Blackberry Curve tops iPhone in first quarter: NPD
Electronics / Consumer & Gadgets
May 04, 2009 |
4.2 / 5 (5) |
2
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
Apr 27, 2009 |
not rated yet |
0
(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.
EBay 1st-qtr profit, sales fall on weak economy
Apr 22, 2009 |
not rated yet |
0
(AP) -- EBay Inc. said Wednesday the weak economy contributed to declines in both earnings and revenue for the second consecutive quarter, but the online marketplace operator beat analysts' expectations.
AMD posts deeper loss, shares fall
Apr 21, 2009 |
not rated yet |
0
(AP) -- Advanced Micro Devices Inc.'s loss widened in the first quarter as demand and prices for its microprocessors slumped and charges for the biggest restructuring in the company's 40-year history took ...
Yahoo's feeble 1Q triggers nearly 700 more layoffs
Apr 21, 2009 |
not rated yet |
0
(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.
TI profit, revenue tumble on shrinking demand (Update)
Apr 20, 2009 |
not rated yet |
0
(AP) -- Texas Instruments Inc. said Monday that first-quarter profit and revenue tumbled as competition heightened and demand for its chips shrank amid the recession, but the results still beat the company's own expectations ...
Google's search for savings boosts 1Q profit 9 pct (Update 2)
Apr 16, 2009 |
1 / 5 (1) |
1
(AP) -- The recession is prodding Google Inc. to grow up faster than a lot of people anticipated.
Nokia profit plunges 90 percent in Q1
Apr 16, 2009 |
not rated yet |
0
(AP) -- Nokia Corp. on Thursday said profits plummeted 90 percent in the first quarter because of fading demand for mobile phones amid the worldwide downturn - but its shares surged as analysts had expected ...
PC shipments slide in 1Q, HP tops Dell in US (Update)
Apr 15, 2009 |
not rated yet |
0
(AP) -- Global shipments of personal computers fell 7.1 percent in the first three months of the year, but the decline was smaller than expected and research group IDC on Wednesday said the industry could turn around by ...
