era name EN there are three common e. n. in the western calendar: 1) the words anno domini or their initials A.D., which appear before the rest of a date, 2) the words before Christ or before the common era, or their initials B.C. or common era or their initials C.E., which appear after the year name, in a date name phrase; the former means the year is after that in which Jesus the Christ was presumably born, and the latter before that year; the e. n. is described in PS-RULE DP1, where it may precede the rest of the date, and in DP3 where it may follow; in the Chinese-Japanese-Korean date phrase the e. n. has three possibilities in PS-RULE ODP6: 1) a dynasty phrase possibly together with an emperor name and a reign name, 2) an emperor name followed possibly by a reign name, or 3) simply a reign name