What is Good Friday?

• Good Friday is a Christian holiday commemorating the crucifixion of Jesus Christ and his death at Calvary.Wikipedia
  Celebrations: No traditional celebrations
  Observances: Worship services, prayer and vigil services, fasting, almsgiving
  Date: The Friday immediately preceding Easter Sunday
  Significance: Commemorates the crucifixion and death of Jesus Christ
• https://www.firstpost.com/living/what-is-good-friday-and-what-is-its-significance-in-the-easter-week-for-christians-3383942.html