The phrase "in Christian era" is often used to refer to the period of time after the birth of Jesus Christ. However, there are several synonyms that can be used to describe this same period. One alternative is to use the term "Common Era", which is becoming more widely used as a secular alternative to the traditional "Anno Domini" (AD) dating system. Another option is to use "CE" or "BCE" instead of "AD" and "BC". Additionally, some people prefer to use the term "after the birth of Christ" or "after the coming of Christ" to describe this time period. Overall, there are many ways to talk about the period of time after the birth of Jesus Christ, depending on one's personal beliefs and preferences.