The Information that leaked was correct. Niantic just officially announced the Pokemon GO Easter Event: Eggstravaganza 2017 is starting today and lasts to April 20!
- Lasts from April 13 to April 20 (1:00 P.M. PDT)
- Greater variety of Pokémon in 2KM Eggs
- Double XP during the event, stacks with Lucky Egg
- More Candy for Every Egg hatch
- Lucky Eggs discounted by 50%
The leak came from a source who have been reliable, so was that case this time.
Guide for the Event (Advanced Guide)
Try and hatch all the eggs you have before the event, as new eggs will have higher chance of rare Pokemon and stock up on Incubators
Buy discounted Lucky Eggs, but only use them for hatching 2 KM Eggs, don’t waste them on other Egg types.
Be careful with power ups, there is no increase in Stardust gains, so save your Stardust for powering up your best hatches at the end of the event.
Official post from Pokemon GO:
Lace up your walking shoes and get ready to put a spring in your step—the Pokémon GO Eggstravaganza is nearly here! From 1:00 P.M. PDT on April 13 to 1:00 P.M. PDT on April 20, 2017, a greater variety of Pokémon can now be found in 2 km Eggs, so get cracking and see what you find! Your Egg-venture doesn’t stop there, though—you’ll also earn more Candy for every Egg you hatch!
Throughout this Eggstravaganza, you’ll also level up even faster with double XP! Combine this Egg-cellent bonus with a Lucky Egg, and you’ll earn four times the XP you normally would. To make this Eggstravaganza even sweeter, Lucky Eggs will be 50% off in the in-game shop!
Get out there, hatch some Eggs, and share your stories with us using #PokemonGO on your favorite social media channels.
—The Pokémon GO team