There is still a lunisolar calendar, though on a fixed pattern rather than by observation. It preserves the original Biblical months and holidays.
Even between eastern and western Christendom the Easter holiday is different. Most of the Jewish ethos is maintained in the New Testament but Grace and Mercy are emphasized more. Stoning is no longer as popular as it once was, how do the Torah respecting Jews handle some of the prescriptions for infractions found in the Old Testament?
I am maintaining that Judaism is already "complete" in and of itself, however much of the "Jewish ethos" the nt "preserved."
In order to execute the death penalty a number of contingencies must be met (the sacrifices being brought on the altar, the Great Sanhedrion sitting in the Lishkat HaGazit, etc.). In past times even in the Exile the Jewish community (then a sovereign, self-governing entity) could execute the death penalty with permission of the host government. Needless to say, I advocate this until the Temple is rebuilt.
For some reason you don't seem to understand my main point: whatever merit you claim for the rituals and commandments of the "new law" was already there in spades for the original Biblical law.
Okay. Good point: If the merit of rituals and commandments was there already, what then is the point of this outspoken Nazarean?
OTOH, if Judaism is complete in itself why all the fuss in their prophecies about some Messiah or "chosen one"? Or rebuilding the Temple for that matter? Really, when something's complete it's complete, no?