Easter Sunday is the most celebrated Christian holiday worldwide and is a time to commemorate the resurrection of Jesus Christ. This holy day is observed on the first Sunday following the first full moon after the vernal equinox, which usually falls between March 22 and April 25. Easter Sunday is a time of joy, hope, and renewal, and is celebrated with various traditions and customs in different parts of the world. 

The origins of Easter date back to the 2nd century AD when Christians began adapting pagan traditions that celebrated the arrival of spring. The resurrection of Jesus Christ, which took place three days after his crucifixion, became the focus of the Easter celebration, and the symbolism of the holiday reflects this event.

One of the most popular Easter traditions is the Easter egg, which symbolizes new life and hope. The practice of coloring and decorating eggs is believed to have originated in medieval Europe, and has since become a beloved custom around the world. In some cultures, like in Russia and Ukraine, the elaborately decorated eggs are called pysanky and are believed to possess special powers. 

Another common Easter tradition is the Easter bunny, who brings baskets filled with eggs, candy, and other treats to children. The origins of the Easter bunny are unclear, but it is believed to have started in Germany in the 16th century.

Church services are an essential part of Easter Sunday celebrations, and many Christians attend special ceremonies and participate in various religious rituals. The day starts with the sunrise service, where worshippers gather at dawn to celebrate Jesus Christ's resurrection. The service typically includes hymns, prayers, scripture readings, and a sermon.

Easter Sunday is celebrated all over the world, with each country having its unique traditions and customs. In Spain, for example, Easter is marked with elaborate processions that are characterized by solemnity and reverence. In the Philippines, the Lenten season is observed with the "Senakulo," a reenactment of the passion of Christ, which culminates in a grand procession on Easter Sunday. 

In all, Easter Sunday is a day of joy and hope for Christians worldwide. It is a time to celebrate the resurrection of Jesus Christ, and the symbols of the holiday reflect this event. Whether it's the Easter egg, the Easter bunny, or the church services, Easter is a time of renewal, and a reminder that there is always hope, no matter what challenges we may face in life.