Christians celebrate Ester Sunday around the world
It marks the story of Jesus rising from the dead three days after dying on a wooden cross.
For many people, Easter is also a time for chocolate eggs, hot cross buns and being with family.
Read on to find out more about this religious festival.
The date of Easter Sunday is different every year.
It is celebrated on the first Sunday after the first full moon that follows the spring equinox.
The date of the equinox is determined by the Earth's tilt on its axis as it travels around the Sun.
At the equinox, the Earth's axis is tilted neither towards nor away from the Sun, making day and night nearly equal in length.
The spring equinox takes place on 19, 20 or 21 March.
In 2025 the first full moon after the spring equinox will fall on 13 April.
Good Friday in 2025 is 18 April and Easter Sunday is 20 April.
There are different days during Easter to mark different events which are written in the Bible about Jesus' life.
On Good Friday, Christians commemorate Jesus' crucifixion, when he died on a wooden cross.
It's a day of mourning in the church, and services are held to reflect on Jesus' suffering.
After Jesus died, his body was taken to be buried in a tomb. It was heavily guarded by Roman soldiers, and a huge boulder was placed in front of it.
Two days later on the Sunday, a woman called Mary Magdalene and some of Jesus' followers visited the tomb, only to find the boulder pushed to one side and the inside completely empty.
Later that day, they found Jesus alive and realised God had resurrected him. This is why Christians celebrate Easter Sunday.
There are church services to commemorate Jesus rising from the dead during Easter.
Many churches have a service late on Saturday, the day before Easter Sunday, called the Easter vigil.
It is often a time of quiet reflection, and a large candle called a Paschal candle is often lit to represent the resurrection.
Then on Easter Sunday some churches may decorate and fill the church with flowers to celebrate the discovery of Jesus rising from the dead.
