Bunny Day started in Animal Crossing: New Horizons, and special eggs will be hidden all over your island. Finding enough of these eggs will give you access to special clothing sets and crafting recipes for each type of egg. If you manage to unlock all six sets, you'll have access to a special Egg Party Dress and Egg Party Hat recipe, so you can look dapper.
Bunny Day will run from April 1 to April 12, so you have plenty of time to find those hidden eggs.
Earth eggs
You can find Earth Eggs buried all over your island. They will have the same ground marker as the Fossils, so be sure to dig up any you see to get as many Dirt Eggs as possible.
Sky Eggs
Sky eggs float above the island on balloons. They will have a rainbow colored balloon, so you will instantly know whether or not the floating gift contains a Heavenly Egg.
Eggs in leaves
Leafy eggs can be found on trees that do not bear fruit. In the Northern Hemisphere, it will be the cherry blossoms, while in the Southern Hemisphere, it will be the standard island trees. Simply shake the tree to make the eggs fall, then scoop them up from the ground using Y.
Wooden eggs
To get wooden eggs, you will have to cut down trees. Remember to use a brittle or stone ax, unless you want to completely cut the tree, in which case also use the normal ax. Each chopt the wood produced also has the option of producing a wooden egg.
Stone eggs
Unsurprisingly, Stone Eggs can be obtained every day by collecting stones on your island. You should also be able to get Eggs from any Mystery Island tours you do, so keep that in mind if you're unlucky with your Island Stones.
Water eggs
Water eggs can be found while fishing. Whenever you successfully catch a fish, it has the option of producing a Water Egg instead. Remember to use Fish Bait to spawn more fish spawns, to increase your chances of getting a Water Egg.