This is an incredible prophecy is found in Zechariah and Daniel, and is fulfilled in Luke 19, the prophecy is so precise it predicts 483 years (to the day) when Jesus would enter Jerusalem.
The word "sevens" is the Hebrew word "shabuim." Much like the word decade means 10 years in English, in this context shabuim is understood to mean a week of years.
Shabuim Means 7 yr period, so: 7 + 62 = 69 (seven 'sevens,' and sixty-two 'sevens.'). Sixty-nine 7 year periods = 483 years (7 * 69 = 483).
The ancient calendar was based on a 360 day year, so 483 years times 360 days = 173,880 days
Now the next question is, when was the decree given to rebuild Jerusalem?
The answer is found in Nehemiah chapter 2.
Nehemiah was the cup bearer to the king; He was very sad one day and the king asked him why. He told the king that it was because the city of his people was destroyed. Nehemiah chapter 2 beginning in verse 1 says: (1) In the month of Nisan in the twentieth year of King Artaxerxes, when wine was brought for him, I took the wine and gave it to the king. I had not been sad in his presence before;(2) so the king asked me, "Why does your face look so sad when you are not ill? This can be nothing but sadness of heart." I was very much afraid, (3) but I said to the king, "May the king live forever! Why should my face not look sad when the city where my fathers are buried lies in ruins, and its gates have been destroyed by fire?" (4) The king said to me, "What is it you want?" Then I prayed to the God of heaven, (5) and I answered the king, "If it pleases the king and if your servant has found favor in his sight, let him send me to the city in Judah where my fathers are buried so that I can rebuild it."
The chapter goes on to say that the king – a very powerful man – gave Nehemiah written permission to do what ever it took to rebuild Jerusalem.
(Hebrew tradition says that if the day is not given then it is assumed to be the 1st day of the month, which meant that the decree was given the 1st day of Nisan in the 20th year of Artaxerxes the king).
If you calculate it out, the 1st day of Nisan 445 BC = March 14th 445 BC.
Add 173, 880 DAYS to Mar 14th 445 BC and you get APRIL 6, 32 AD.
What happened April 6, 32AD? As explained in Luke 19:35-37, Jesus rode into Jerusalem on a donkey and presented Himself as the Messiah, the King, just as Daniel and Zechariah prophesied.