I'm not wrong, because I'm keeping to God's Word.
The Daniel 9:27 verse reveals a final symbolic period of "one week" (or one seven). Per the prophecy, that "one week" is to equal a period of 7 years.
In the MIDDLE of that "one week",
that verse says that is when the abomination of desolation is placed...
Dan 9:27
27 And he shall confirm the covenant with many for one week: and in the midst of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading of abominations he shall make it desolate, even until the consummation, and that determined shall be poured upon the desolate.
KJV
In Jesus' Olivet discourse Signs, He showed the "great tribulation" will be when that "abomination of desolation" idol is seen setup in Jerusalem...
Matt 24:15-21
15 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand
16 Then let them which be in Judaea flee into the mountains:
17 Let him which is on the housetop not come down to take any thing out of his house:
18 Neither let him which is in the field return back to take his clothes.
19 And woe unto them that are with child, and to them that give suck in those days!
20 But pray ye that your flight be not in the winter, neither on the sabbath day:
21 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
KJV
Thusly, there... is the start... of the last half of the "one week", the latter 3 1/2 years, or 1260 days, or a time, times, and half a time, whichever way you want to figure it. It is the 1260 days of God's two witnesses prophesying against the beast in Revelation 11, within the 6th Trumpet - 2nd Woe period. That... is the "great tribulation" time Lord Jesus was pointing to above.
And thus your confusion about the abomination of desolation being setup in the MIDDLE of the symbolic "one week".
So if you say,
"The GT is 3 1/2 years, not 7", then it means you DO adhere to that Daniel 9:27 prophecy being about the end of this world, and not about Christ's 1st coming. Sorry, but I'm not going to allow you to speak out of both sides of your mouth contradicting yourself without my bringing your attention to it.
What?? Those preachers you listen to have really confused you away from Scripture. The Revelation 16:15 warning is by Lord Jesus that He comes "as a thief", and He is speaking to His Church. That Message is pointing to TWO SUBJECTS,
a.) the timing of His coming "as a thief", and
b.) the fact that He gave that warning within the 6th Vial timeline.
Now I could cover a long post about that "as a thief" metaphor, because He taught it in His Olivet discourse about the symbolic thief breaking in, and to be watching so as to prevent the thief and not suffer your house to be broken into. He compared the day of His coming with that thief breaking in. And He even used the metaphorical time of 'midnight' within it! (Mark 13:35).
How are you going to understand those ideas written in Scripture if you cannot understand symbolic metaphor or allegory?