Reference

Zephaniah 1:15

That day is a day of wrath, a day of trouble and distress, a day of wasteness and desolation, a day of darkness and gloominess, a day of clouds and thick darkness,
13

Therefore their goods shall become a booty, and their houses a desolation: they shall also build houses, but not inhabit them; and they shall plant vineyards, but not drink the wine thereof.

14

The great day of the Lord is near, it is near, and hasteth greatly, even the voice of the day of the Lord: the mighty man shall cry there bitterly.

15

That day is a day of wrath, a day of trouble and distress, a day of wasteness and desolation, a day of darkness and gloominess, a day of clouds and thick darkness,

16

A day of the trumpet and alarm against the fenced cities, and against the high towers.

17

And I will bring distress upon men, that they shall walk like blind men, because they have sinned against the Lord: and their blood shall be poured out as dust, and their flesh as the dung.

Counter-Arguments

The strongest case that this verse does not belong in this theme.

The Lords Day

The verse describes a day of judgment and destruction, not a day of worship or a special religious observance. The phrase "That day" refers to a future calamitous event, not a recurring day of worship like "the Lord's Day" as commonly understood in Christian theology.