'Lord's' in the Bible

“Then it will come about on the day of the Lord’s sacrificeThat I will punish the princes and the king’s sonsAnd all who are clothed in [lavish] foreign apparel [reflecting their paganism].

Neither their silver nor their goldWill be able to rescue themOn the day of the Lord’s indignation and wrath.And the whole earth will be consumedIn the fire of His jealous wrath,For He shall make a full and complete end,Indeed a terrifying one,Of all the inhabitants of the earth.

Seek the Lord [search diligently for Him and regard Him as the foremost necessity of your life],All you humble of the landWho have practiced His ordinances and have kept His commandments;Seek righteousness, seek humility [regard them as vital].Perhaps you will be hidden [and pardoned and rescued]In the day of the Lord’s anger.