As seen on the forum, easter is coming with loads of stuff and of course: egghunting!
During the event you'll have 4 quest chains with 5 quest each. Every quest rewards with 10 eggs, completing a chain rewards with 100 eggs so makes a grand total of 150 eggs/chain.
2 quests per chain are egg hunt adventures, there are 8 different maps with eggs to explore, but no worries: If you can't find an egg, check the maps with the solution ;)
Something more interesting:
It's known you can find eggs with the explorer with a treasure hunt. At Siedlervision, a German TSO-information site, they managed to do some predictions:
Predicted chances & amount of finding eggs (a faded egg means no egg at all):
How many eggs you'll gain during the event without trading?
150 eggs per quest chain x 4 chains = 600 eggs
21 days of searching with a standard explorer:
10 Very long searches gives 10 x 5 = 50 eggs each.
21 days of searching with a Savage scout or eggsplorer:
20 Very long searches gives 20 x 5 = 100 eggs each.
So an intensive player with the maximum of 3 Explorers & 10 Savage scouts can get:
600 + 3 x 50 + 10 x 100 = 600 + 150 + 1000 = 1750 eggs
A casual player with 2 standard and 1 fast:
600 + 2 x 50 + 1 x 100 = 600 + 100 + 100 = 800 eggs
(Note these numbers are predictions! So the results may differ or chances even altered during the actual event)