Not so.
The "Tribulation" is for SEVEN Years.
Daniel 9:24-27
"Seventy 'sevens' are decreed for your people and your holy city to finish transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the most holy. Know and understand this: From the issuing of the decree to restore and rebuild Jerusalem until the Anointed One, the ruler, comes, there will be seven 'sevens,' and sixty-two 'sevens.' It will be rebuilt with streets and a trench, but in times of trouble. After the sixty-two 'sevens,' the Anointed One will be cut off and will have nothing. The people of the ruler who will come will destroy the city and the sanctuary. The end will come like a flood: War will continue until the end, and desolations have been decreed. He will confirm a covenant with many for one 'seven.' In the middle of the 'seven' he will put an end to sacrifice and offering. And on a wing of the temple, he will set up an abomination that causes desolation, until the end that is decreed is poured out on him." (NIV)
The Great Tribulation (Referring to the second half of the seven year period.)
Matthew 24:21
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)
The "Tribulation" is for SEVEN Years.
Daniel 9:24-27
"Seventy 'sevens' are decreed for your people and your holy city to finish transgression, to put an end to sin, to atone for wickedness, to bring in everlasting righteousness, to seal up vision and prophecy and to anoint the most holy. Know and understand this: From the issuing of the decree to restore and rebuild Jerusalem until the Anointed One, the ruler, comes, there will be seven 'sevens,' and sixty-two 'sevens.' It will be rebuilt with streets and a trench, but in times of trouble. After the sixty-two 'sevens,' the Anointed One will be cut off and will have nothing. The people of the ruler who will come will destroy the city and the sanctuary. The end will come like a flood: War will continue until the end, and desolations have been decreed. He will confirm a covenant with many for one 'seven.' In the middle of the 'seven' he will put an end to sacrifice and offering. And on a wing of the temple, he will set up an abomination that causes desolation, until the end that is decreed is poured out on him." (NIV)
The Great Tribulation (Referring to the second half of the seven year period.)
Matthew 24:21
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)
Daniel's 70 weeks are literal 7 day periods, or 490 literal days.
If Daniel meant 490 years he would have written
(Four hundred and ninety years), simple
Daniel had no restrictions in "Writing" exact numerology as seen below.
Daniel 6:1KJV
It pleased Darius to set over the kingdom an hundred and twenty princes, which should be over the whole kingdom;
Daniel 8:14KJV
And he said unto me, Unto two thousand and three hundred days; then shall the sanctuary be cleansed.
Daniel 12:11KJV
And from the time that the daily sacrifice shall be taken away, and the abomination that maketh desolate set up, there shall be a thousand two hundred and ninety days.
Below in Daniel 10:2-3 we see just another example of Daniel's literal weeks, as Daniel mourned and fasted for 3 literal weeks or 21 days.
Daniel 10:2-3KJV
2 In those days I Daniel was mourning three full weeks.
3 I ate no pleasant bread, neither came flesh nor wine in my mouth, neither did I anoint myself at all, till three whole weekswere fulfilled.
Below in Daniel 9:24-27 we see 70 literal future weeks or 490 days.
When the call/commandment goes out in Jerusalem to build unto the Jewish Meshiach/Messiah that they wait for (They Denied Jesus Christ) this will start the 7 week period.
62 literal weeks will be in building, and Meshiach/Messiah will be cut off by the Antichrist who stops the building.
The 70th literal week will see the antichrist revealed in making a covenant, and in the middle of this literal week he proclaims to be Meshiach/Messiah God to the Jews, and Jesus returned to the apostate church, to start a Millennium on earth.
The 3.5 year tribulation has started.
Daniel 9:24-27KJV
24 Seventy weeks are determined upon thy people and upon thy holy city, to finish the transgression, and to make an end of sins, and to make reconciliation for iniquity, and to bring in everlasting righteousness, and to seal up the vision and prophecy, and to anoint the most Holy.
25 Know therefore and understand, that from the going forth of the commandment to restore and to build Jerusalem unto the Messiah the Prince shall be seven weeks, and threescore and two weeks: the street shall be built again, and the wall, even in troublous times.
26 And after threescore and two weeks shall Messiah be cut off, but not for himself: and the people of the prince that shall come shall destroy the city and the sanctuary; and the end thereof shall be with a flood, and unto the end of the war desolations are determined.
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.