His birth is celebrated annually on December 25 (or various dates in January for some eastern churches) as a holiday known as
Christmas, his crucifixion is honored on
Good Friday, and his resurrection is celebrated on
Easter. The widely used
calendar era "
AD", from the Latin anno Domini ("in the year of the Lord"), and the alternative "
CE", are based on the approximate birth date of Jesus.[j]
The name Jesus is derived from the Latin Iesus, a
transliteration of the
GreekἸησοῦς (Iesous). The Greek form is a rendering of the
Hebrewישוע (Yeshua), a variant of the earlier name יהושע (Yehoshua), or in English, "
Joshua". The name Yeshua appears to have been in use in Judea at the time of the birth of Jesus. The 1st century works of historian
Flavius Josephus, who wrote in
Koine Greek, the same language as that of the New Testament, refer to at least twenty different people with the name Jesus (i.e. Ἰησοῦς). The etymology of Jesus' name in the context of the New Testament is generally given as "Yahweh is salvation".
Christians of the time designated Jesus as "the Christ" because they believed him to be the Messiah, whose arrival is
prophesied in the
Hebrew Bible and Old Testament. In postbiblical usage, Christ became viewed as a name—one part of "Jesus Christ". The term "
Christian" (meaning a follower of Christ) has been in use since the 1st century.