Mitä tarkoittaa ajanlaskun käsite 'ajanlaskumme alku'?
Common Era or Current Era (CE) is one of the notation systems for the world's most widely used calendar era. BCE (Before the Common Era/Before the Current Era) is the era before CE. BCE and CE are alternatives to the Dionysian AD and BC system. The Dionysian era distinguishes eras using AD (", "[the] year of [the] Lord") and BC ("before Christ"). Since the two notation systems are numerically equivalent, " CE" corresponds to "AD " and "400 BCE" corresponds to "400 BC". Both notations refer to the Gregorian calendar (and its predecessor, the Julian calendar). The year-numbering system utilized by the Gregorian calendar is used throughout the world today, and is an international standard for civil calendars.
one of the notation systems for the world's most widely used calendar era