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.
nether do men lyght a cadell and put it vnder a busshell but on a candelstick and it lighteth all that are in the house. Matthew 5:15 TYN