Lord's days is a phrase that refers to the Christian Sabbath, which is typically observed on Sunday. There are several synonyms for this phrase, many of which are rooted in religious language. One common synonym is "the day of rest," which emphasizes the idea of taking a break from work and focusing on worship and spiritual reflection. Another synonym is "the Sabbath day," which directly links the observance to the Jewish tradition of observing a day of rest on Saturday. Other synonyms include "the day of the Lord," "the day of worship," and "the holy day." Each of these phrases can be used interchangeably to describe the Christian Sabbath and its significance in religious practice.