Because it was the coming of the Holy Spirit to the world to dwell in believers and to be our Comforter and Guide. It is the day that the Spirit came to the apostles, and empowered them to begin spreading the Gospel around the world, thus beginning the church of Jesus Christ.
Holy Spirit to come upon them on the day of Pentecost.
I was asking this same question myself, and I have found the answer, and it is fascinating. In Leviticus 23:10-11 and 15-17, The Word of God explains the calculation for what we call Pentecost (the Greek word for 50) as counting 50 days from the Feast of First Fruits, which is the first day after the first Sabbath after Passover. However, contemporary Jewish practice is to celebrate this Pentecost(called the Feast of Weeks in Hebrew, not called Pentecost) 50 days after Passover. In fact, this year, if you count 50 days from the day after the first Sabbath after Passover, you go past June 9, the date published on the Hebrew calendar, and end up on June 16. June 9 is 50 days from Passover. Dr. Thomas McCall, a theologian, wrote an article about this with an explanation about the descrepency, and you can access it at http://www.levitt.com/essays/pentecost.html. I hope this helps you.
When jesus had died and they were in a room praying as the holy sprit gifted them with the speech of all nationalities
3000 were added to the Church on the day of Pentecost.
The first Pentecost in Acts 2 occurred around 33 AD. This date is calculated based on the historical context provided in the Bible, particularly in relation to the crucifixion of Jesus Christ. The event of Pentecost, where the Holy Spirit descended upon the apostles, is considered by many scholars to have taken place during the Jewish festival of Pentecost, fifty days after Passover.
No. Pentecost is a Christian-exclusive holiday.
some Christians
In Christianity, the holiday known as Shavuot is called 'Pentecost.' While Jews celebrate God Giving them the Torah on Shavuot, Christians celebrate God Sending them the Holy Spirit on Pentecost.
On Pentecost
Because on Pentecost, we celebrate the Coming Of the Holy Spirit, so on the following Sunday, we celebrate all 3 Divine Persons of the Holy Trinity.
They recognize it, revere it, and acknowledge it's reality, but don't celebrate it in the sense of outwardly expressed traditions.
The Giving of the Torah & the First Fruits.
Many Christians including Catholics celebrate the Easter liturgical season for 50 days from Easter Sunday to Pentecost.
Around 11 of them and they add one for the replace of Judas Iscariot.
Christians celebrate the Trinity all of the time. However, the Sunday after Pentecost is known as 'Trinity Sunday.'
I am a member of a main line arm of Christianity and we do not celebrate the coming of the Holy Spirit on the Day of Pentecost. Perhaps others do?
A lot of it depends on what domination you are in. The basic ones that all Christians celebrate are Christmas and Easter. Others include Advent, Pentecost, and Lent.