The moon turns blood red and the sun turns dark before the great day of the Lord. Matthew 24:29-31 mentions the same event, yet it places the celestial phenomenon as occurring after the "tribulation of those days". According to these passages, it then seems that the day of the Lord is an event closely tied with the coming of the Messiah to judge the world. 2 Peter 3:8-10 reads "But, beloved, do not forget this one thing, that with the Lord one day [is] as a thousand years, and a thousand years as one day. The Lord is not slack concerning [His] promise, as some count slackness, but is long suffering toward us, not willing that any should perish but that all should come to repentance. But the day of the Lord will come as a thief in the night, in which the heavens will pass away with a great noise, and the elements will melt with fervent heat; both the earth and the works that are in it will be burned up." "Lord's Day" as Christian day of worship Meredith Kline equates the "Day of the Lord" with the "Lord's Day", which is usually taken to refer to the Christian weekly day of rest. Kline argues that the "Lord's Day" mentioned in Revelation 1:10 is not first day of the week, but refers to "the already realized heavenly enthronement of the Lord Jesus." References Hebrew Bible words and phrases New Testament words and phrases Christian eschatology Christian terminology Jewish eschatology de:Tag des Herrn