As Easter is mostly a Christian holiday, it isn't quite as cross-culturally celebrated as Christmas. As such, it isn't quite so prevalent in countries that aren't Christian-dominant. Certainly not in the African colonies or on Heiya Island. But the European colonies definitely celebrated it. The French colony was still getting started so there wasn't much Easter-themed going on, asides from the bunnies getting a lot of attention. But the colonies on the island of Great Britain had their own way of celebrating.
Lord Chumlee hosted an Easter egg hunt not unlike what was going on in Lyre. Though the egg hunt was still limited to the grounds of his manor. Still, there was a lot of places for children to look for eggs and he had the White Rabbit and March Hare to manage the egg hunt. Yes, while Lord Chumlee's decision to become a dodo still met with some derision, he hadn't completely given up on creating his own Wonderland. There were still plenty of famous characters that could appear as Animalians: the Dormouse, the Walrus, Bill the Lizard. Obviously, the Caterpillar would have to be either an animatronic or someone in costume. And considering the Animalian virus can't create hybrids outside of an animal family, he would need an eagle Animalian and a cow Animalian to wear parts of a lion costume and turtle costume respectively to recreate the Gryphon and the Mock Turtle.
Up in Scotland, Castle MacDuff was still more of a tourist stop than a colony. Obviously, the pandemic has put a lot of construction on hold. At least the castle was being more renovated to 21st century standards. But there was one part that made Easter there interesting. Instead of a traditional Easter egg hunt through the grounds, it was on Loch Ness. To be precise, the 'Easter egg's were brightly colored floats that were floating within a secluded area of the Loch. The kids would be taken out in a motorboat and would try to scoop up the floats with long nets. Nellie swam around to make sure none of the floats drifted too far and in case anyone fell overboard. After that, it would be back to shore for a luncheon of roast lamb.
While farther behind compared to colonies like Mieni Atoll and Maelewano, the British government was promising that their Animalian colonies will be expanding as soon as the pandemic was more or less over.