[header] How to celebrate a traditional easter sunday [title] Understand the liturgical seasons of lent and easter. [step] Easter sunday is the day when christians celebrate the resurrection of jesus christ. Easter marks the completion of lent, which is a 40-day period of prayer, penance and fasting. 
The last week of lent, which is the week before easter, is often referred to as holy week. During this week, christians observe palm sunday, which marks jesus' return to jerusalem; holy thursday, which is when jesus held his last supper with his disciples; and good friday, which is when jesus was crucified.