Easter is celebrated not just on Easter Sunday but extends to a season known as Eastertide or the Easter Season. This season begins on Easter Sunday and lasts for 50 days, ending on Pentecost Sunday. This period commemorates the resurrection of Jesus and the time he remained on Earth before his ascension, lasting 40 days, plus an additional 10 days leading up to Pentecost, the day when the Holy Spirit descended upon the disciples. The entire 50-day period is viewed as one continuous joyful feast in Christianity. This means Easter is celebrated over a long season of 50 days rather than a single day, reflecting significant theological meanings and traditions within the Christian liturgical calendar.