I know exactly when it is! it’s “at the last trump”
Read 1 Cor 15:52
“if the dead rise not? let us eat and drink; for to morrow we die.”
You got to read the rest of the chapter.
1Co 15:51 “ Behold, I show you a mystery; We shall not all sleep, but we shall all be changed,
1Co 15:52 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”