It is usually dated through the eschatological discourse in Mark 13, which scholars interpret as pointing to the First Jewish–Roman War (66–74 AD)—a war that led to the destruction of the Second Temple in AD 70. This would place the composition of Mark either immediately after the destruction or during the years immediately prior.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/religion/judaism/second-temple/second-temple.md
Nor have I called them hypotheses with any other end in view except that it may be known that I think I am able to deduce them from those first truths which I have already expounded; and yet that I have expressly determined not to do so, to prevent a certain class of minds from thence taking occasion to build some extravagant Philosophy upon what they may take to be my principles, and my being blamed for it. I refer to those who imagine that they can master in a day all that another has taken twenty years to think out, as soon as he has spoken two or three words to them on the subject; or who are the more liable to error and the less capable of perceiving truth in very proportion as they are more subtle and lively.
Jews and Christians have not observed Leviticus’s instructions for animal offerings since the 1st century AD, following the destruction of the Second Temple in Jerusalem in 70 AD. As there was no longer a Temple at which to offer animal sacrifices, Judaism pivoted towards prayer and the study of the Torah, eventually giving rise to Rabbinic Judaism.