It's OK to think of Christ bearing the wrath of God
in a sense his whole life long. Joshua points to this in his answer, reference the Westminster Stds., because Jesus state in the Incarnation is one of humiliation. It is not just humiliation to our level, but it is also humiliation
under the curse. And this language is present in the Three Forms of Unity.
Heidelberg Question 37
Q. What do you confess when you say that He suffered?
A. During all the time He lived on earth, but especially at the end, Christ bore in body and soul the wrath of God against the sin of the whole human race.[1] Thus, by His suffering, as the only atoning sacrifice,[2] He has redeemed our body and soul from everlasting damnation,[3] and obtained for us the grace of God, righteousness, and eternal life.[4]
[1] Is.53:1-12; 1Tim.2:6; 1Pet.2:24; 3:18. [2] Rom.3:25; 1Cor.5:7; Eph.5:2; Heb.10:14; 1Jn.2:2; 4:10. [3] Rom.8:1-4; Gal.3:13; Col.1:13; Heb.9:12; 1Pet.1:18-19. [4] Jn.3:16; Rom.3:24-26; 2Cor.5:21; Heb.9:15.
We do want to take care, however, because there is also that sense in which Christ (during his whole life and ministry) was approved by God. "This is my
beloved Son, in whom I am well pleased." So, we need to be careful to say that the cross of Christ is where he bears that full wrath and curse due to his elect for sin, and not just a general bearing of it voluntarily, though he is manifestly unworthy of it.
None of that observation should overturn the reality that many people today (sadly) are not careful to admire Christ for his whole sin-bearing life lived on our behalf.