According to the in-app timer, the Hatchery activity and the prize shop will remain open for you to spend and Faerie Dust through Tuesday, May 5. However, today is the last day to earn , Faerie Dust, and threshold prizes, and there are no more Neopets.com item restocks currently planned.
For more information on the mechanics of the event, check out our event guides:
Even if you don't care about the cosmetics, you can accumulate a lot of power-ups and gold coins just by doing the hatching, and it's going for another 6 days.