Well, what do you call the time from Christ's crucifixion/resurrection/ascension to the throne of the Father and the final destruction of the temple in AD70, the end of the age (Matt. 24:3; Heb. 9:26)?
Just look around, where is your forever temple and old covenant system?
This is the gist of the New Testament, that the old was a shadow, decayed and passing away (Col. 2:16,17; Heb. 8:13). Christ and His apostles attest to such. Who is the one in denial?