"Year our Lord" refers to the current year in the Christian calendar, which begins with the birth of Jesus Christ. Synonyms for this phrase include "Anno Domini" (AD), which is Latin for "in the year of our Lord". This is often abbreviated to simply "A.D." Other synonyms for "Year our Lord" include "Christian era" or "common era" (CE). These terms are used to differentiate the Christian calendar from other calendars that may be used in different cultures or religions. While these terms are often used interchangeably, they all refer to the same system of marking time based on the birth of Jesus Christ.