Every year, a scarlet cord was hung from the Temple on the Day of Atonement. This was the Holy Day when Jewish people atoned for all the sins they had committed the previous year. One goat was sacrificed in the Temple and a second, identical goat carrying the sins of the people was sent out into the wilderness. If God had accepted the sacrifices, the scarlet thread at the Temple would turn white, symbolizing purity. The Temple was destroyed in AD 70. During the last 40 years of the Temple, the scarlet cord did not change to white. This phenomenon began about AD 30. The monk who calculated the birth of Christ was off by 4 - 7 years, placing the start of this event during the year of Jesus's crucifixion.
The second thing that happened was that the Temple doors sometimes opened by themselves.
From the Talmud:
"And the doors of the Temple Hall would open by themselves, until Rabbi Yohanan so of Zakkai rebuked them, saying "Temple Hall, Temple Hall, why do you yourself keep sounding the alarm? I already know about you, that you are to be destroyed, for long ago Zechariah, a descendant of Iddo, prophesied to you, 'Open thy doors, O Lebanon, that the fire may devour thy cedars"
Hebrews 5 says that Jesus is our high priest in the Heavenly Temple making intercession for us in a way that earthly priests could not. There is no longer any sacrifice we could offer that will make us acceptable to God or cleanse us from our sins. Jesus did it all.