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Leap Year Problem
The leap year problem (also known as the leap year bug or the leap day bug) is a problem for both digital (computer-related) and non-digital documentation and data storage situations which results from errors in the calculation of which years are leap years, or from manipulating dates without regard to the difference between leap years and common years. Categories Leap year bugs typically fall into two categories, based on the amount of impact they may have in real-world usage: # Those that lead to error conditions, such as exceptions, error return codes, uninitialized variables, or endless loops # Those that lead to incorrect data, such as off-by-one problems in range queries or aggregation Examples Python The following Python code is an example of a Category 1 leap year bug. It will work properly until today becomes February 29. Then, it will attempt to create a February 29 of a common year, which does not exist. The date constructor will raise a ValueError with the message ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leap Year
A leap year (also known as an intercalary year or bissextile year) is a calendar year that contains an additional day (or, in the case of a lunisolar calendar, a month) compared to a common year. The 366th day (or 13th month) is added to keep the calendar year synchronised with the astronomical year or seasonal year. Since astronomical events and seasons do not repeat in a Natural number, whole number of days, calendars having a constant number of days each year will unavoidably drift over time with respect to the event that the year is supposed to track, such as seasons. By inserting ("Intercalation (timekeeping), intercalating") an additional day—a leap day—or month—a leap month—into some years, the drift between a civilization's dating system and the physical properties of the Solar System can be corrected. An astronomical year lasts slightly less than 365 days. The historic Julian calendar has three common years of 365 days followed by a leap year of 366&nb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AeroXperience
AeroXperience is a Windows enthusiast blog/community cited numerous times for various Microsoft-related articles. As of May 8, 2009, AeroXperience ranks within the top 70,000 sites on the internet according to Netcraft.On November 20, 2009, it was renamed to winJade. It is semi-frequently cited for information on upcoming Microsoft technologies and has a media presence at most Microsoft conventions. (Note: The red badge on the interviewer is a PDC 2008 media badge) On November 20, 2009, it was renamed to winJade. Notable Articles AeroXperience has been cited thus far for at least the following notable articles:Internet Explorer 8 can be removed from Windows 7 A lesson on infinite loops(analyzing the Zune 30 leap year glitch) The Ultimate Steal (no, really) The Five Pillars of Windows 7ref name="All About Microsoft Five Pillars"> Q & A with Amitabh Srivastavaref name="SuperSite Blog Amitabh"> Hypothetical thoughts on what Windows 7 Milestone 3 might haveref name="A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calendars
A calendar is a system of organizing days. This is done by giving names to periods of time, typically days, weeks, months and years. A calendar date, date is the designation of a single and specific day within such a system. A calendar is also a physical record (often paper) of such a system. A calendar can also mean a list of planned events, such as a court calendar, or a partly or fully chronological list of documents, such as a calendar of wills. Periods in a calendar (such as years and months) are usually, though not necessarily, synchronized with the cycle of the solar calendar, sun or the lunar calendar, moon. The most common type of pre-modern calendar was the lunisolar calendar, a lunar calendar that occasionally adds one intercalary month to remain synchronized with the solar year over the long term. Etymology The term ''calendar'' is taken from , the term for the first day of the month in the Roman calendar, related to the verb 'to call out', referring to the " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Year 2100 Problem
In computer science, data type limitations and software bugs can cause errors in time and date calculation or display. These are most commonly manifestations of arithmetic overflow, but can also be the result of other issues. The best-known consequence of this type is the Y2K problem, but many other milestone dates or times exist that have caused or will cause problems depending on various programming deficiencies. Year 1975 On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting into this gives 4 January 1975, which is therefore the latest encodable date. The "DATE-75" patch pushed the last encodable date to 1 February 2052, making the ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Time Formatting And Storage Bugs
In computer science, data type limitations and software bugs can cause errors in system time, time and date calculation or display. These are most commonly manifestations of arithmetic overflow, but can also be the result of other issues. The best-known consequence of this type is the Y2K problem, but many other milestone dates or times exist that have caused or will cause problems depending on various programming deficiencies. Year 1975 On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting into this gives 4 January 1975, which is therefore the latest encodable date. The "DATE-75" patch pushed the last encodable date to 1 February 2052, ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New Zealand Herald
''The New Zealand Herald'' is a daily newspaper published in Auckland, New Zealand, owned by New Zealand Media and Entertainment, and considered a newspaper of record for New Zealand. It has the largest newspaper circulation in New Zealand, peaking at over 200,000 copies in 2006, although circulation of the daily ''Herald'' had declined to 100,073 copies on average by September 2019. The ''Herald''s publications include a daily paper; the ''Weekend Herald'', a weekly Saturday paper; and the ''Herald on Sunday'', which has 365,000 readers nationwide. The ''Herald on Sunday'' is the most widely read Sunday paper in New Zealand. The paper's website, nzherald.co.nz, is viewed 2.2 million times a week and was named Voyager Media Awards' News Website of the Year in 2020, 2021, 2022, and 2023. In 2023, the ''Weekend Herald'' was awarded Weekly Newspaper of the Year and the publication's mobile application was the News App of the Year. Its main circulation area is the Auckland R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Düsseldorf Airport
Düsseldorf is the capital city of North Rhine-Westphalia, the most populous state of Germany. It is the second-largest city in the state after Cologne and the seventh-largest city in Germany, with a 2022 population of 629,047. The Düssel, from which the city and the borough of Düsseltal take their name, divides into four separate branches within the city, each with its own mouth into the Rhine ( Lower Rhine). Most of Düsseldorf lies on the right bank of the Rhine, and the city has grown together with Neuss, Ratingen, Meerbusch, Erkrath and Monheim am Rhein. Düsseldorf is the central city of the metropolitan region Rhine-Ruhr, the second biggest metropolitan region by GDP in the European Union, that stretches from Bonn via Cologne and Düsseldorf to the Ruhr (from Duisburg via Essen to Dortmund). The ''-dorf'' suffix means "village" in German (English cognate: '' thorp''); its use is unusual for a settlement as large as Düsseldorf. Linguistically, Düsseldorf is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Machine
In computing, a virtual machine (VM) is the virtualization or emulator, emulation of a computer system. Virtual machines are based on computer architectures and provide the functionality of a physical computer. Their implementations may involve specialized hardware, software, or a combination of the two. Virtual machines differ and are organized by their function, shown here: * ''System virtual machines'' (also called full virtualization VMs, or SysVMs) provide a substitute for a real machine. They provide the functionality needed to execute entire operating systems. A hypervisor uses native code, native execution to share and manage hardware, allowing for multiple environments that are isolated from one another yet exist on the same physical machine. Modern hypervisors use hardware-assisted virtualization, with virtualization-specific hardware features on the host CPUs providing assistance to hypervisors. * ''Process virtual machines'' are designed to execute computer programs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microsoft Azure
Microsoft Azure, or just Azure ( /ˈæʒər, ˈeɪʒər/ ''AZH-ər, AY-zhər'', UK also /ˈæzjʊər, ˈeɪzjʊər/ ''AZ-ure, AY-zure''), is the cloud computing platform developed by Microsoft. It has management, access and development of applications and services to individuals, companies, and governments through its global infrastructure. It also provides capabilities that are usually not included within other cloud platforms, including software as a service (SaaS), platform as a service (PaaS), and infrastructure as a service (IaaS). Microsoft Azure supports many programming languages, tools, and frameworks, including Microsoft-specific and third-party software and systems. Azure was first introduced at the Professional Developers Conference (PDC) in October 2008 under the codename "Project Red Dog". It was officially launched as Windows Azure in February 2010 and later renamed to Microsoft Azure on March 25, 2014. Services Microsoft Azure uses large-scale virtualizati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
February 29
February 29 is a '' leap day'' (or "leap year day")—an intercalary date added periodically to create leap years in the Julian and Gregorian calendars. It is the 60th day of a leap year in both Julian and Gregorian calendars, and 306 days remain until the end of the leap year. It is the last day of February in leap years only. It is also the last day of meteorological winter in the Northern Hemisphere and the last day of meteorological summer in the Southern Hemisphere in leap years. In the Gregorian calendar, the standard civil calendar used in most of the world, February 29 is added in each year that is an integer multiple of four, unless it is evenly divisible by 100 but not by 400. For example, 1900 was not a leap year, but 2000 was. The Julian calendar— since 1923 a liturgical calendar—has a February 29 every fourth year without exception. Consequently, February 29 in the Julian calendar, since 1900, falls 13 days later than February 29 in the Gregorian, u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gmail
Gmail is the email service provided by Google. it had 1.5 billion active user (computing), users worldwide, making it the largest email service in the world. It also provides a webmail interface, accessible through a web browser, and is also accessible through the official mobile application. Google also supports the use of third-party email clients via the Post Office Protocol, POP and Internet Message Access Protocol, IMAP protocols. At its launch in 2004, Gmail (or Google Mail at the time) provided a storage capacity of one gigabyte per user, which was significantly higher than its competitors offered at the time. Today, the service comes with 15 gigabytes of storage for free for individual users, which is divided among other Google services, such as Google Drive, and Google Photos. Users in need of more storage can purchase Google One to increase this 15 GB limit across most Google services. Users can receive emails up to 50 megabytes in size, including attachments, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
