Eastertide is also known as the Great Fifty Days. It is one long alleluia from Easter Day until Pentecost: two feasts that correspond to the Jewish feasts of Passover and Shavuot. It is the most joyful season in the liturgical year: the liturgical colour is white and gold, and churches are full of flowers, especially lilies. Eastertide consists of seven Sundays: Easter Day is the first, and the others are numbered accordingly — the Second Sunday of Easter follows. In some traditions, the Sunday before Ascension Day is Rogation Sunday. See also the Wikipedia article on Eastertide.