From the news today:
Festival of Neggs News: This year's Festival is drawing to a close! Today is your last chance to find all of the neggs, so start solving those clues while you still can. And be sure to return to Kari's Campsite tomorrow to finish the event and collect your prize(s)!
(Originally it was assumed that there would be 16 neggs to find, but apparently tomorrow is counting as only the final prize day, not a final negg-finding day.)
For a full rundown of where to go, check out our guide:
The accompanying NC Event, Dip & Dye Neggs, will be available until April 30th for you to redeem your Dyeing Kits.