Lent is the period of fasting and penitence through which Christians prepare for the observance of Jesus Christ's death and resurrection. It takes place on the forty days preceding Easter Sunday, beginning on Ash Wednesday. The Sundays in Lent are not considered part of the fast, so from Ash Wednesday to Easter Sunday actually constitutes 46 daysIt has traditionally been regarded as a period of fasting, with observances ranging from strict fasting, to the keeping specific fast days such as Ash Wednesday or Good Friday, or simply "giving something up for lent". The final week of Lent, known as Holy Week begins with Palm Sunday and ends with the celebration of Christ's resurrection on Easter Sunday. Unlike Christmas, which always takes place on the same day, Easter is a movable Feast, taking place according to the lunar calendar.