The Day of Atonement, or Yom Kippur in Hebrew, was celebrated in the fall. The meaning of atonement here is to ransom, or to remove by paying a price. This is exactly what Jesus would do for us.
Seven coordinating blogs begin here: https://lightofchristjourney.com/2022/04/03/days-of-awe/
A video of this story can be found here:https://youtu.be/IGIZNKX9ewY