Easter eggs and bunnies have become a symbol of the holiday and it wouldn't be Easter without indulging on chocolate, with supermarkets brimming with sweet treats already.

But Easter Sunday falls on different dates annually, and it's set to be later in the year for 2014.

So when is Easter 2014?

Easter Sunday falls on April 20 this year. The long bank holiday weekend begins on Good Friday, April 18, and Easter Monday on April 21 is the final day in the bank holiday festivities.

In western Christianity, Easter always falls between March 22 and April 25.

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Why does Easter change every year?

While many festivals are on fixed days, Easter is a movable feast and is usually celebrated on the first Sunday after the full moon on or after March 21, because it is based on the lunar calendar.

Who decides when Easter is?

The First Council of Nicea was a council of Christian bishops convened in Nicaea in Bithynia by the Roman Emperor Constantine I in AD 325.

They made decisions in an effort to attain a consensus on several Christian topics.

Based on the paschal full moon, it was decided by the bishops that Easter Day would fall on the next full moon after the spring equinox.

This was because Easter must fall on a Sunday as it was the day of Christ’s resurrection.

The paschal full moon was chosen because the date of Passover in the Jewish calenda, and the Last Supper (Holy Thursday) occurred on the Passover. Therefore, Easter is the Sunday after Passover.

But since the paschal full moon can be on different days in different time zones, it was decided that the full moon is always determined to be the 14th day of the lunar month.

Even though the spring equinox can occur on March 20, the church also fixes the spring equinox as March 21.

Spring term ends on April 4 and schools then go back on April 22, meaning the Easter weekend falls right at the end of the two-week holiday.