Easter: Feast of the resurrection of our Lord

Easter is the celebration of the resurrection of Jesus Christ from the dead after his crucifixion.  The octave of Easter lasts from Easter Sunday to the second Sunday of Easter which is also called Divine Mercy Sunday (April 12, 2015).  However, Easter season lasts for 50 days from the first Sunday of Easter until Pentecost (May 24th, 2015) which celebrates the Holy Spirit's descent upon the apostles and the birth of the Catholic Church.  The liturgical season of lent precedes Easter and begins with Ash Wednesday (February 18, 2015).

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Catholic Liturgical Calendar for 2017 With Holy Days of Obligation 

Mary, Mother of God - Thursday, January 1
Holy Day of Obligation
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Ash Wednesday - Wednesday, March 1
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Palm Sunday - Sunday, April 9
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Holy Thursday - Thursday, April 13
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Good Friday - Friday, April 14
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Holy Saturday - Saturday, April 15
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Easter Sunday - Sunday, April 16
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Divine Mercy Sunday - Sunday, April 23
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Ascension - Thursday, May 25; transferred to Sunday, May 28
Holy Day of Obligation
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Pentecost Sunday - Sunday, June 4
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Trinity Sunday - Sunday, June 11
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Corpus Christi - Thursday, June 15, 2017
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Sacred Heart of Jesus - Friday, June 12
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Assumption of Mary - Saturday, August 15, 2017) Holy Day of Obligation
Holy Day of Obligation - abrogated because it falls on a Saturday
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  All Saints Day - Sun day, November 1
Holy Day of Obligation
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First Sunday of Advent - Sunday, December 3, 2017) Complete Advent schedule

Immaculate Conception - Tuesday, December 8
Holy Day of Obligation
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Christmas - Friday, December 25
Holy Day of Obligation
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