Holidays, feasts and fasts are a significant part of Christian religious practice. Feast days celebrate joyous events like the birth of Christ, while fast days provide a special opportunity for self-reflection and repentance. Some Christian holidays have come to have a considerable impact on western culture and traditions.
The most important Christian holiday is Easter, a spring holiday that celebrates Christ's resurrection from the dead.
Another holiday that has become important is Christmas, which commemorates the birth of Jesus on December 25 (January 6 in Orthodox Churches).
Saints' days are also important to most Christian denominations. Some of these, such as St. Patrick's Day and St. Valentine's Day, have come to play a prominent role in popular western culture.