Luke 4:19 New English Translation

¹⁹to proclaim the year^[a] of the Lord’s favor.”^[b]

Luke 4:19 sn The year of the Lord’s favor (Grk “the acceptable year of the Lord”) is a description of the Year of Jubilee (Lev 25:10). The year of the total forgiveness of debt is now turned into a metaphor for salvation. Jesus had come to proclaim that God was ready to forgive sin totally.
Luke 4:19 sn A quotation from Isa 61:1-2a. Within the citation is a line from Isa 58:6, with its reference to setting the oppressed free.

New English Translation (NET)