sothic cycle
31Islamic calendar — Arabic calendar redirects here. For the Gregorian calendar in Arabic, see Arabic names of calendar months. This …
32Chronology — For other uses, see Chronology (disambiguation). For specific lists of events, see Timeline. Joseph Scaliger s De emendatione temporum (1583) began the modern science of chronology[1] Chronology (from Latin chronologia, from …
33Japanese era name — The Japanese era calendar scheme is a common calendar scheme used in Japan, which identifies a year by the combination of the Japanese era name (年号, nengō?, lit. year name) and the year number within the era. For example, the year 2011 is Heisei… …
34Hindu units of measurement — Vedic and Puranic units of time span from the Paramáńu (about 17 microseconds) to the mahamanvantara (311.04 trillion years). Hindu theology considers the creation and destruction of the universe a cyclic process. Contents 1 Introduction 2 Time 2 …
35Geologic record — The layer cake like appearance of concordant strata laid down over hundreds of thousands of years …
36Anno Domini — This article is about the designation of years. For other uses, see Anno Domini (disambiguation). AD redirects here. For other uses, see AD (disambiguation). Dionysius Exiguus invented Anno Domini years to date Easter. Anno Domini (abbreviated as …
37Radiocarbon dating — (sometimes simply known as carbon dating) is a radiometric dating method that uses the naturally occurring radioisotope carbon 14 (14C) to estimate the age of carbon bearing materials up to about 58,000 to 62,000 years.[1] Raw, i.e. uncalibrated …
38Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… …
39Decimal time — French decimal clock from the time of the French Revolution Decimal time is the representation of the time of day using units which are decimally related. This term is often used to refer specifically to French Revolutionary Time, which divides… …
40Egyptian calendar — the calendar of ancient Egypt, having a year consisting of twelve 30 day months, with five additional days at the end, leap year not being considered. * * * ▪ chronology dating system established several thousand years before the Christian… …
