Mary anointed Jesus in Bethany six days before the Passover. Scripture tells us the next day (Saturday, not Sunday) was the triumphant entry.
For clarification see the website writings A Biblical View of Holy Week.
http://www.philandpatti.com/abiblicalviewofholyweek

John 12:16
At first his disciples did not understand all this. Only after Jesus was glorified did they realize that these things had been written about him and that they had done these things to him.

The disciples still do not understand. Many people think of the disciples as being well versed in Jewish law and scripture but they may not have been. They may not have been regular worshipers at all and may have know very little of the prophecies of the Messiah. That may explain why they did not understand so many things, even after Jesus explained things to them. They didn’t understand many things until Jesus was glorified.

Jesus was very indignant when he overturned the tables of the moneychangers in the temple. He did the same thing at the beginning of His mission.

When Jesus quoted scripture, He was quoting from the law which the chief priests and teachers of the law knew very well. They knew the law. Jesus knew they knew the law. That’s why He quoted it!

When Jesus say “Father, glorify your name!” a voice spoke from heaven. Some said it thundered, others said an angel had spoken. Why the difference? Could it be that non-believers heard thunder, believers heard an angel? Why would people have thought they heard thunder? Was there a presence of dark clouds? Are we as believers listening for the voice from heaven? If we are, maybe, just maybe we may hear it!