Jewish – 8.04-14.04 - Passover starts on the 15th day of Nisan in the Hebrew calendar and lasts for 7 or 8 days, usually in April. It celebrates the liberation of the Israelites from slavery and their exodus from Egypt, over 3000 years ago. Christianity – 12.04 Easter Sunday is the culmination of Holy Week. Easter commemorates the resurrection of Jesus Christ. It is the most important Christian festival, and the one celebrated with the greatest joy. Islamic – 24.04 – 24.05 Ramadan uncountable noun. Ramadan is the ninth month of the Muslim year, when Muslims do not eat between the rising and setting of the sun. During Ramadan, Muslims celebrate the fact that it was in this month that God first revealed the words of the Quran to Mohammed.