99-year leaseA 99-year lease, under historic English law, since widely received abroad, was traditionally seen as the longest practical term of a lease of real property without it being considered perpetual. While it is no longer a hard legal limit in most common law jurisdictions today, 99-year leases continue to be common as a matter of business practice. In some countries (such as Singapore) land reform legislation has resulted in most or all land being owned by the state and leased to users, which often takes the form of...
United KingdomThe United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in northwestern Europe, off the coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland, with a population of over 69 million in 2024. The UK includes the island of Great Britain, the north-eastern part of the island of Ireland, and most of the smaller islands within the British Isles, covering 94,354 square miles (244,376 km). It shares a land border ...
One country, two systems"One country, two systems" (1C2S) is a constitutional principle of the People's Republic of China (PRC) describing the governance of the special administrative regions of Hong Kong and Macau. Deng Xiaoping developed the one country, two systems concept. This constitutional principle was formulated in the early 1980s during negotiations over Hong Kong between China and the United Kingdom. It provided that there would be only one China, but that each region would retain its own economic and administrative system. ...
Time formatting and storage bugsIn 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 1975On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating...
Yevpatoria RT-70 radio telescopeThe Yevpatoria RT-70 radio telescope (P-2500, RT-70) is an RT-70 radio telescope and planetary radar at the Center for Deep Space Communications, Yevpatoria, Crimea. In scientific literature, it is often called the Evpatoria Planetary Radar (EPR).
MillenniumA millennium (pl. millennia or millenniums) is a period of one thousand years. Normally, the word is used specifically for periods of a thousand years that begin at the starting point (initial reference point) of the calendar in consideration and at later years that are whole number multiples of a thousand years after the start point. The term can also refer to an interval of time beginning on any date. Millennia sometimes have religious or theological implications (see millenarianism). The word millennium deriv...
21st centuryThe 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on 1 January 2001, and will end on 31 December 2100. It is the first century of the 3rd millennium. The rise of a global economy and Third World consumerism marked the beginning of the century, along with increased private enterprise and deepening concern over terrorism after the September 11 attacks on the United States in 2001. The NATO intervention in Afghanistan and the United States-...
Antarctic Treaty SystemThe Antarctic Treaty and related agreements, collectively known as the Antarctic Treaty System (ATS), regulate international relations with respect to Antarctica, Earth's only continent without a native human population. It was the first arms control agreement established during the Cold War, designating the continent as a scientific preserve, establishing freedom of scientific investigation, and banning military activity; for the purposes of the treaty system, Antarctica is defined as all the land and ice shelv...
Anno DominiCalendar era based on the birth of Jesus Today(at UTC+00)Monday, 21 September 2026Gregorian21 September, AD 2026Julian8 September, AD 2026 (AM 7534)Other calendarsAkanNwonadwoArmenian3 Sahmi 1476AztecTititl 14, 8 EhēcatlBabylonian8 Ululu, 2337 SEBalinese pawukonLuang, Pepet, Beteng, Menala, Umanis, Aryang, Coma of Bala, Uma, Ogan, RaksasaBengali6 Ashshin, BS 1433ChineseYang Earth Dog・Heart MansionFire Horse Year, Month 8, Day 11(Bailu, 2 days until Qiufen)Common Era21 September 2026 CECoptic11 Thout, AM 1743E...
Roman numeralsNumbers in the Roman numeral systemRoman numerals on stern of the ship Cutty Sark showing draught in feet. The numbers range from 13 to 22, from bottom to top.Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Like many other ancient numeral systems, Roman numerals are based on the additive principle: a number is written by concatenating individual symbols, each representing a fixed value, and the val...
Futures studiesFutures studies, futures research or futurology is the systematic, interdisciplinary and holistic study of social and technological advancement, and other environmental trends, often for the purpose of exploring how people may live and work in the future. Futures studies scholars make predictions of the future and aim at systematically exploring alternatives to the predictions. Futures studies are a branch of the social sciences and an extension to the field of history. Futures studies (colloquially called "futu...
Julian dayDays since the beginning of the Julian Period Today(at UTC+00)Tuesday, 8 September 2026Julian day2461292 Other calendars Akan Fobene Armenian 20 Hoṙi 1476 Aztec Tititl 1, 8 Ātl Babylonian 25 Abu, 2337 SE Balinese pawukon Menga, Pasah, Jaya, Pon, Tungleh, Anggara of Menail, Guru, Dangu, Pandita Bengali 24 Bhadro, BS 1433 Chinese Yin Wood Rooster・Turtle Beak Mansion27 Qīyuè, Bǐngwǔnián(Bailu, 15 days until Qiufen) Common Era 8 September 2026 CE Coptic 3 Nesi, AM 1742 Egyptian 25 Tybi, 2775 NE Ethiopian 3...
Common EraEra names equivalent to AD/BC Today(at UTC+00)Tuesday, 8 September 2026Common Era8 September 2026 CE Other calendars Akan Fobene Armenian 20 Hoṙi 1476 Aztec Tititl 1, 8 Ātl Babylonian 25 Abu, 2337 SE Balinese pawukon Menga, Pasah, Jaya, Pon, Tungleh, Anggara of Menail, Guru, Dangu, Pandita Bengali 24 Bhadro, BS 1433 Chinese Yin Wood Rooster・Turtle Beak Mansion27 Qīyuè, Bǐngwǔnián(Bailu, 15 days until Qiufen) Common Era 8 September 2026 CE Coptic 3 Nesi, AM 1742 Egyptian 25 Tybi, 2775 NE Ethiopian 3 Pā...*As an Amazon Associate I earn from qualifying purchases.