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The year 1 BC/BCE is numbered 0, the year 2 BC is numbered −1, and in general the year n BC/BCE is numbered "−(n − 1)" [1] (a negative number equal to 1 − n). The numbers of AD/CE years are not changed and are written with either no sign or a positive sign; thus in general n AD/CE is simply n or +n. [1]
The two notation systems are numerically equivalent: "2025 CE" and "AD 2025" each describe the current year; "400 BCE" and "400 BC" are the same year. [ 1 ] [ 2 ] The expression can be traced back to 1615, when it first appears in a book by Johannes Kepler as the Latin : annus aerae nostrae vulgaris ( year of our common era ), [ 3 ] [ 4 ] and ...
A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. [1] For example, the current year is numbered 2025 in the Gregorian calendar, which numbers its years in the Western Christian era (the Coptic Orthodox and Ethiopian Orthodox churches have their own Christian eras).
This is a list of Hijri years (Latin: anno Hegirae or AH) with the corresponding common era years where applicable. For Hijri years since 1297 AH (1879/1881 CE), the Gregorian date of 1 Muharram , the first day of the year in the Islamic calendar , is given.
See calendar and list of calendars for other groupings of years. See history , history by period , and periodization for different organizations of historical events. For earlier time periods, see Timeline of the Big Bang , Geologic time scale , Timeline of evolution , and Logarithmic timeline .
The 30th century BC was a century that lasted from the year 3000 BC to 2901 BC. Events. Stele bearing the name of Djet. Before 3000 BC: An image of a deity ...
The current average interest rate for a 30-year fixed mortgage is 7.10% for purchase and 7.08% for refinance, increasing 6 basis points from 7.04% for purchase and 1 basis point from 7.07% for ...
CE: Clear (last) Entry ... algebraic entry, programmable, stored-program electronic calculators. [29] [30] ... led within a few years to the cheap pocket calculator ...