This page relates to the year 1 av. J. - C. of the Calendrier Julien, i.e. the last year before the Christian era.
For the number -1 , to see the article -1 (number)

Year zero and negative years

The Christian calendars (Julien or Gregorian) comprise no year zero , since number zero did not exist yet in the Romain Empire at the time where the Julien calendar was created, and that the years are ordinal numbers counted from 1. In the same way the negative numbers did not exist yet, and one counted the years preceding one year by reference from 1, just like the year under review itself. (This tradition is common to all the traditional and modern calendars, including the republican Calendrier, the calendars Semitic, the Thai calendar, and same the modern eras of the Japanese calendar). In the same way, one never notes the sign + for the posterior years.

However, in the scientific computations, based on the calendar UTC, year 1 is noted 0 UTC , and the former years are noted with negative numbers UTC . There thus exists a variation of 1 between the absolute value of negative or null years UTC of scientific use on the one hand, and the years of the Julien calendar of historical use on the other hand.

It is strongly disadvised using the numbers negative or null without precision of the applicable calendar, as well for the historical references as scientific, because they comprise an ambiguity on the actual value. For the very old years however, former to, i.e. former to II, the references (pre) historical are generally not ambiguous because these dates are not known with a sufficient precision, and one often finds these years noted with negative numbers (rather than positive with )   ; it is only about one simplification of writing, one or the other year being equivalent.

In the Wikipédia encyclopedia, no year zero is used, and the possible negative years mean the of the same year absolute value (unless otherwise specified explicit of calendar UTC).

Events

• the doctrines of the Bouddha penetrates in China.
• the Roman Poète Ovide writes its Art to like .

Births

• December 25th  : go back supposed birth to Jesus according to the Christian tradition. The year 1 (which follows year 1 immediately) is the Anno Domini or year of the first birthday (on December 25th) of Jesus-Christ.
• Ptolémée de Maurétanie (approximate date)

Death

Be-X-old: 1 дан. э.

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