My claim is true, and here are the biblical reasons why it is true (which you failed to check before responding).
JOHN 5:28,29: BOTH RESURRECTIONS APPEAR TO BE TOGETHER IN ONE HOUR
28 Marvel not at this: for the hour is coming, in the which all that are in the graves shall hear his voice, 29 And shall come forth; they that have done good, unto the resurrection of life; and they that have done evil, unto the resurrection of damnation.
JOHN 6:39,40,44,54: THE RESURRECTION OF BELIEVERS ON THE LAST DAY
39 And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day. 40 And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day. 44 No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day. 54 Whoso eateth my flesh, and drinketh my blood, hath eternal life; and I will raise him up at the last day.
JOHN 12:48: THE JUDGMENT OF UNBELIEVERS ON THE LAST DAY
48 He that rejecteth me, and receiveth not my words, hath one that judgeth him: the word that I have spoken, the same shall judge him in the last day.
1 COR 15:51,52 THE PRE-TRIBULATION RESURRECTION OF THE SAINTS
51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed, 52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
REV 20:11,12:THE RESURRECTION OF THE UNRIGHTEOUS DEAD AT THE GWT
11 And I saw a great white throne, and him that sat on it, from whose face the earth and the heaven fled away; and there was found no place for them.
12 And I saw the dead, small and great, stand before God; and the books were opened: and another book was opened, which is the book of life: and the dead were judged out of those things which were written in the books, according to their works...15 And whosoever was not found written in the book of life was cast into the lake of fire.
In view of these passages, it would not only be absurd, but blasphemous to claim that the resurrection of the saints also happens at the Great White Throne (GWT) Judgment. Yet both resurrections are said to be -- METAPHORICALLY -- "on the last day". Indeed "in the same hour" if we would take that literally!
Furthermore, the Resurrection/Rapture of the saints must occur before the Tribulation. And the Tribulation is followed by (1) the Great Tribulation, (2) Cataclysmic Cosmic Events, (3) the Second Coming of Christ, (4) the resurrection of the Tribulation saints, (5) the Millennium, (6) the release of Satan from the bottomless pit, (7) the battle of Gog and Magog, and (8) finally the Great White Throne Judgment for the unrighteous dead. This covers a period of over 1,000 years, yet is within the "Last Day" time-frame.
After that the earth and atmospheric heaven will be supernaturally burned uo. And that will LITERALLY be the last day for this age, since the New Heavens and the New Earth will be immediately established after that.