This argument illustrates how the discussed verse 2 Peter 3:8 may be present in the Bible as a way to allow the reader to understand the timing of the second coming of Jesus (beyond other possible functions of this verse).
We read in Scripture that Jesus rose from the dead on the third day (1 Corinthians 15:4). Since the discussed verse 2 Peter 3:8 defines one year as one thousand days, it could have meant, besides its other possible interpretations, that at the dawn of the third millennium Jesus would come back.
To back this up, consider what pro-Israel Christian camp preaches, namely that before Jesus comes, Israel must be restored as a country after more than two millennia since it was overthrown by Babylonian kingdom, which happened several hundred years prior to the first coming of Christ (e.g. see the book The Restoration of Israel by Gerhard Falk). And if we look at the history, Israeli state was created in 1948. And it is clear that we are now early in the third millennium A.D.
Now, most of Christian theologians would agree with me that Bible contains symbols, which are subject to interpretation:
"... we should avoid attempting to find meanings in every minute object and allusion. Our best security is to keep closely to the analogy of biblical symbols and imagery as seen in a full collation of pertinent
examples" (Biblical Hermeneutics: A Treatise on the Interpretation of the Old and New Testaments by Milton Spenser Terry)
So, it is fair to draw a hypothetical parallel between the duration of Jesus' absence from being present among the people in the living form (while being dead for more than two days according to the Scripture), and the possible timing of his promised second coming, which the Bible asserts cannot be known with precision, but only roughly:
"Even so, when you see all these things, you know that it is near,
right at the door ... But about that day or hour no one knows, not
even the angels in heaven, nor the Son, but only the Father" (Matthew
As for validity of this hypothesis, consider that in Biblical Hermeneutics, analogy (as was already mentioned) is used to connect various symbols each of which brings some more information to the overall picture that they promote as a whole. The connecting factor here is the fact that three days according to the definition of one day given in verse 2 Peter 3:8 is equal to three thousand years, which is the same as three millenia.
As for whether the second coming of Jesus can be compared to the resurrection, in one sense such allowance can be made, given that both, the resurrection of Jesus, as well as the second coming of Jesus, imply the reoccurring of the physical presence of Jesus on the earth in living form, as was already mentioned.