Albert Barnes Commentary Job 2:1

"Again it came to pass on the day when the sons of God came to present themselves before Jehovah, that Satan came also among them to present himself before Jehovah." — Job 2:1 (ASV)

Again there was a day ... - See the notes at (Job 1:6). These seasons are represented as periodical, when the angels came, as it were, to report to God what they had observed and done. The Chaldee renders this, “And there was a day of the great judgment (רבא דינא יום yôm dı̂ynā' rābā'), a day of the remission of sins (שבוק יום סרחניא) and there came bands (כתי) of angels.”

To present himself before the Lord - This does not occur in the former statement in (Job 1:6). It here means that he came before the Lord after he had permission to afflict Job. The Chaldee renders it, “that he might stand in judgment דין dı̂yn before the Lord.”