I, personally, don't think the tribulation will be like many of us picture or like we've been led to believe. A time of gloom and darkness.
You're correct. It's the day of the LORD that's going to be the real gloom and darkness, that is, for the wicked, but not for Christ's servants who remain faithful to Him.
Joel 2:1-6
1 Blow ye the trumpet in Zion, and sound an alarm in My holy mountain: let all the inhabitants of the land tremble: for the day of the LORD cometh, for it is nigh at hand;
2 A day of darkness and of gloominess, a day of clouds and of thick darkness, as the morning spread upon the mountains: a great people and a strong; there hath not been ever the like, neither shall be any more after it, even to the years of many generations.
3 A fire devoureth before them; and behind them a flame burneth: the land is as the garden of Eden before them, and behind them a desolate wilderness; yea, and nothing shall escape them.
4 The appearance of them is as the appearance of horses; and as horsemen, so shall they run.
5 Like the noise of chariots on the tops of mountains shall they leap, like the noise of a flame of fire that devoureth the stubble, as a strong people set in battle array.
6 Before their face the people shall be much pained: all faces shall gather blackness.
(KJV)
The locust army in power (tribulation timing) is not going to be a pleasant time either. But it won't be like God's wrath afterwards.
Joel 2:11
11 And the LORD shall utter His voice before His army: for His camp is very great: for he is strong that executeth His word: for the day of the LORD is great and very terrible; and who can abide it?
(KJV)
Amos 5:18
18 Woe unto you that desire the day of the LORD! to what end is it for you? the day of the LORD is darkness, and not light.
(KJV)
Zeph 1:7-8
7 Hold thy peace at the presence of the Lord GOD: for the day of the LORD is at hand: for the LORD hath prepared a sacrifice, He hath bid His guests.
8 And it shall come to pass in the day of the LORD's sacrifice, that I will punish the princes, and the king's children, and all such as are clothed with strange apparel.
(KJV)
Clothed with "strange apparel"? Yeah, clothed with the working of the fake.
Zeph 1:14-18
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.
18 Neither their silver nor their gold shall be able to deliver them in the day of the LORD's wrath; but the whole land shall be devoured by the fire of His jealousy: for He shall make even a speedy riddance of all them that dwell in the land.
(KJV)