what does the bible say?
The New Testament states that Jesus rose on the first day of the week, Sunday (Matthew 28:1; Mark 16:2; Luke 24:1; John 20:1). Debates about the day of the crucifixion arise because He is said to have been in the grave for three days. Although biblical evidence most strongly supports a Friday death, some suggest a Wednesday or Thursday death to explain the three-day period. The Wednesday theory proposes two Sabbaths that week: a festival Sabbath related to Passover, followed by the usual weekly Sabbath (Mark 15:42; 16:1; Luke 23:52–54; Leviticus 23:7–8). The Thursday theory seeks a closer alignment with the “three nights” mentioned in the Jonah comparison (Matthew 12:40).
Despite these arguments, the traditional Friday view is supported by Jewish timekeeping, which considers days as beginning at sunset (Genesis 1:5; Leviticus 23:32). It also regards any part of a day as a full day (e.g., Esther 4:16; 5:1). Therefore, since Mark indicates the crucifixion occurred the day before the Sabbath (Mark 15:42), it’s best to interpret this according to Jewish timekeeping. This means Jesus was buried on Friday before sunset—the first day—and His resurrection on Sunday morning was the third day (Matthew 16:21; Luke 9:22).