It began after YHvH destroyed the Temple in Jerusalem. Which occurred forty years after the Lamb of G-d was slain for our sins. Call on YHvH's slain Lamb for your salvation. Do not kill a chicken ! Call on the NAME of the Lamb of G-d for salvation. Call on the NAME of Yah'shua (YHvH is my salvation)Not quite timeless.
shalom b'SHEM Yah'shua HaMashiach Joel 2:32 And it shall come to pass,
Today is Erev Yom Kippur.
[that] whosoever shall call on the name of YHvH shall be delivered:
for in mount Zion and in Jerusalem shall be deliverance,
as YHvH hath said, and in the remnant whom YHvH shall call.
on this Yom Kippur.
At least not for atonement reasons.