Easter is held on the Sunday after the first ecclesiastical full moon (which keeps, more or less, in step with the astronomical Moon) following the vernal (spring) equinox of the northern hemisphere, when the sun is exactly above the equator, and day and night are of almost equal length.

• Emperor Constantine, the first Roman emperor to convert to Christianity, convened the Council of Nicaea and decreed that Christ's resurrection was far too important to be connected with the festival of another faith.
• Constantine ordained that Easter was to fall in close proximity to a similar significant time in the solar year.
• Easter Sunday service then commenced at dawn, with the congregation gathering outside the church for hymns before entering for a joyful Mass. Dismissed in grace and forgiveness, worshippers filed out to begin celebratory feasting.

• Eggs were one of the foods forbidden during Lent, the 40-day fasting period of reflection and penitential preparation leading up to Easter.
• In the medieval period, any eggs laid during Lent were boiled for preservation so that when Easter Sunday rolled around, eggs were back on the menu.
• And eggs weren't just used as a food source: a rural practice known as 'pace-egging' was common, where costumed groups roamed villages for eggs then given as gifts to the church as Good Friday offerings and to the lord of the manor.
• Many of these eggs were brightly painted; a practice truly ancient. Red was used to symbolise the blood of Christ, first by early Christians then the Orthodox Church.
• There are suggestions that 16th-century German Protestant reformer Martin Luther organised egg hunts for his congregation.

• Hares became associated with Easter because of their powers of fertility.
• But the entire concept of the ‘Easter Bunny’ is much more recent. It likely became the large colourful rabbit we know and love today due to American influence, but 17th-century Heidelberg-based physicians Georg Franck von Franckenau and Johannes Richier in De ovis paschalibus (‘About Easter eggs’) did describe hares hiding baskets of brightly painted eggs for children to find.
• Yet there is an earlier reference (from 1572) to an Easter ‘Hare’ which appeared at night to ‘lay’ eggs, again for children to search. This continued as German settlers came to America and continued the tradition, thereby spreading it throughout the nation.