The Day of The Lord is somewhat interchangeable.
It has been used for the day of The Rapture, catching away of The Church . . .
as well as His overt and very obvious return for Armageddon when it will be very triumphant for His Kingdom and horrendously horrible for those in rebellion against Him and in support of satan.
Interestingly, the globalist puppet masters have bought into satan’s lie that satan and company will WIN at Armageddon. Evidently a host of “ET’s” [Biblical fallen Watchers, evidently] have facilitated that conviction on the idiot globalist’s parts.