Luke 17:22 New English Translation

²²Then^[a] he said to the disciples, “The days are coming when you will desire to see one of the days^[b] of the Son of Man, and you will not see it.

Luke 17:22 tn Here δέ (de) has been translated as “then” to indicate the implied sequence of events within the narrative.
Luke 17:22 sn This is a reference to the days of the full manifestation of Jesus’ power in a fully established kingdom. The reference to “days” instead of “day” is unusual, appearing only here and in v. 26, but it may be motivated merely by parallelism with the “days” of Noah there and the “days of Lot” in v. 28.

New English Translation (NET)