What happens on Sunday's on animal farm

Every Sunday is a day of rest and devotion to Animalism on Animal Farm. The animals hold an hour-long ceremony at which they raise their new flag. The flag is green to represent England’s pastures and features a hoof and horn that “represent the future Republic of the Animals” that will exist “when the human race [has] finally been overthrown” (48). A gathering called Meeting follows the flag raising, in which the animals plan the coming week and the pigs present resolutions for debate (none of the other animals are intelligent enough to think up resolutions). Snowball and Napoleon tend to debate the most and take opposite sides. The animals end each meeting by singing “Beasts of England.”

The thing that happens on sundays is the animals have events like flying their green flag in the barn.