Adam Clarke on Mark 15:42

The day before the Sabbath - What we would call Friday evening. As the law of Moses had ordered that no criminal should continue hanging on a tree or gibbet till the setting of the sun, Joseph, fearing that the body of our Lord might be taken down, and thrown into the common grave with the two robbers, came and earnestly entreated Pilate to deliver it to him, that he might bury it in his own new tomb. See on Mat 27:56, Mat 27:60 (note).