Joel:

Joel warns, "...The day of the Lord is great (i.e., awesome); it is dreadful..." (Joel 2:11). At that time, the "sun will be turned to darkness and the moon to blood...everyone who calls on the Name of the Lord will be saved..." (Joel 2:31-32). However, Joel stated that, since the Day of the Lord (or Judgment Day) was near, people should "Beat your plowshares into swords and your pruning hooks into spears..." (Joel 3:10; reversal of Isaiah 2:4: perhaps Joel thought of before the day and Isaiah after or on the day.).