This year Easter Sunday (also known as Easter Day) is on April 16.
Christians celebrate Easter on a Sunday as it was the day Jesus rose from the dead, following being crucified on a Friday two days before.
Centuries ago in 325, it was determined by a council of Christian bishops that Easter Day would always be on a Sunday to commemorate the happy occasion.
How are the dates of Easter determined?
The death of Jesus occurred around the Jewish Passover, which is traditionally held on first full moon following the vernal equinox.
As the full moon can vary in each time zone, the Church said that they would use the 14th day of the lunar month instead – the Paschal Full Moon – and host Easter Day on the following Sunday.
Once the date of that moon is known, Easter Day and the Easter holidays can be determined.