In 325CE the Council of Nicaea established that Easter would be held on the first Sunday after the first full moon occurring on or after the vernal equinox.(*) From that point forward, the Easter date depended on the ecclesiastical approximation of March 21 for the vernal equinox.
Easter is delayed by 1 week if the full moon is on Sunday, which decreases the chances of it falling on the same day as the Jewish Passover. The council’s ruling is contrary to the Quartodecimans, a group of Christians who celebrated Easter on the day of the full moon, 14 days into the month.1
What is interesting to think about is that God established dates that we are to celebrate fully knowing that Jesus Christ was to be the fulfillment of those days(holydays or Feasts).
Did you ever wonder why Jesus Christ was called the Lamb of God?
Behold the Lamb of God, which taketh away the sin of the world. John 1:29Or why he was compared to a lamb without blemish or spot?
But with the precious blood of Christ, as of a lamb without blemish and without spot 1 Peter 1:19These weren't coincidences. Jesus Christ was our Passover Lamb just like from the story in Exodus. He was the fulfillment of this and was put on the Cross on Passover.
Did you ever wonder why leaven is equated with sin in the Bible, and unleaven is where one removes the sin? Well on the feast of Unleavened Bread Jesus Christ died taking the sins of the world upon him.
For He hath made Him to be sin for us, who knew no sin, that we might be made righteous of God in Him. 2 Corinthians 5:21
On the feast when leaven is removed from the home, Our Savior Jesus Christ removed the sins of the world. This means that when one receives Him, our sin is covered and He is what God sees. The debt was paid all that needs to be done is calling upon Him.
Did you ever wonder why Jesus Christ was also called the Firstfruit?
But now is Christ risen from the dead, and become the Firstfruits of them that slept. 1 Corinthians 15:20
Jesus Christ was put on the cross on the Feast of Passover, was put in the tomb on the Feast of Unleavened Bread and rose on the Feast of Firstfruits. This is easy to document using not only the Bible but secular historical documents as well. Why do you think that God made these events happen on the dates that in Leviticus 23, we are told should be kept forever as a memorial?
Because the feasts were a foreshadowing of Christ's first coming.
The feasts(or holydays) outlined in Leviticus 23 are not the Jews feasts.
Speak unto the children of Israel, and say unto them, Concerning the feasts of the LORD, which ye shall proclaim to be holy convocations, even these are my feasts. Leviticus 23:2
The feasts outlined in Leviticus 23 are the LORD's feasts.
If Jesus Christ literally fulfilled the first four feasts2 on the date that God established don't you think that when He comes again that the remaining three feasts might be significant for us to study?
The final three feasts are Trumpets, Atonement, and Tabernacles.
Think about this for a moment:
Those familiar with the events about the Second Coming need to think about the words in Bold.
The feast of trumpets:
For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first: 1 Thessalonians 4:16
In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. 1 Corinthians 15:52
The feast of Atonement:
Wherefore God also hath highly exalted him, and given him a name which is above every name:That at the name of Jesus every knee should bow, of things in heaven, and things in earth, and things under the earth; Philippians 2:9-10
*atonement means in the Strongs-H3722 to cover, to purge, to reconcile, (repent from sin) so every knee bowing is a way to do this as when we pray we are on our knees asking for forgiveness from sins as well as other things.
The feast of Tabernacles:
Behold, the tabernacle of God is with men, and he will dwell with them, and they shall be his people, and God himself shall be with them, and be their God. Revelation 21:3
If the first four feasts were fulfilled on the dates God said, and the remaining feasts line up with scriptures He uses about His second coming, don't you think that you should study them?
Back to the setting of the date for Easter...man sets the date. God told us that we should celebrate this date(in three feasts) and gives a specific date for them. Leviticus 23 tells us that Passover is to be celebrated in the first month on the 14th day of the month, and Unleavened Bread in the same month on the 15th day of the month and Firstfruits on the morrow after the sabbath.
God's first month does not line up with man's. In fact, the first month in God's calendar lines up usually between March and April.
Passover this year is tomorrow the 22nd of April. Easter this year was March 27.
God says one thing, man another and who do we follow?
Those that were obedient to God in the first century and keeping the feasts dropped their palm leaves when they saw Christ:
Took branches of palm trees, and went forth to meet him, and cried, Hosanna: Blessed is the King of Israel that cometh in the name of the Lord. John 18:22
I think it is time to wake up and
Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth. 2 Timothy 2:151 How the Easter Date is Determined. Timeanddate.com. Web. April 21, 2016
2 Pentecost in Greek or Shavuout in Hebrew is the fourth feast in Lev 23 (some even call it the feasts of Weeks) it was fulfilled and you can read about this event taking place exactly when God said it would in Acts 2.