I'm not sure what the event was, but the following is what they're updating tomorrow to clean up after the event. Sounds like they got to do a bit more than just search for 3 rabbits that spawn once every few days and give worthless drops.
Detail
All servers:
Mambo Equinox Spring Festival Updates
• End of Spring Festival
• Removing Fresh Eggs, Amulet of Rabbitkind, and all Spring Festival Eggs (Brave Eggs, Mind-Clearing Eggs, and Wafer-like Eggs).
• Removing event spawns: Lost Hens, Lost Ducks, and Foxes.
• Normal Hen, Duck, and Fox spawns returned.
• Removing event-related NPCs: Spring Festival Captain, Caregiver, and Hatcher.
• Removing event-related objects: interval time cards, nursery keys, and event Eggs (whether Hollow Shells, Level 1, all the way up to Glowing Mambo Eggs, Level 10)
***NOTE: Only eggs that have not been turned in to the hatcher will be removed. Eggs that have been hatched but haven’t yet had their prize revealed (player hasn't clicked on his or her egg to see what's inside) will not be removed.
Ok, I found out about the event. Definitely better and more involved than ours;
Detail
Join us on the Depardieu, Ken Rauhel, and Lands of Aden servers for The Mambo Equinox Event!
MAMBO EQUINOX PHASE I: SPRING FESTIVAL (April 13 - April 20)
The Spring Festival Captain takes his place in Giran Square and asks adventurers to search for the Lost Hens and Ducks. Player can bring him back Fresh Eggs (laid by Lost Hens and Ducks), and trade them for Brave Spring Festival Eggs (acts like Potion of Bravery), Wafer-Like Spring Festival Eggs (acts like Elven Wafer), or Mind-Clearing Spring Festival Eggs (acts like Potion of Mana).
NOTE: These Spring Festival Eggs can be used by any class.
Or, a number of Fresh Eggs can be exchanged for an Amulet of Rabbitkind (polymorphs character into Spring Rabbit).
The ducks and hens are good natured birds, and killing them will result in an alignment penalty.
Beware of the foxes out to get the wandering ducks and hens!
**NOTE: Player can trade Amulets of Rabbitkind and Fresh Eggs! Be aware that these items WILL BE REMOVED at the end of the event. Keep this in mind when considering buying these items from other players.**
MAMBO EQUINOX PHASE II: EGG RAISING EVENT (April 14, noon - April 16, 11:59 pm, Central time)
Two new figures, the Hatcher and Caregiver, appear in following towns:
- Gludin Town
- Orc Town
- Windawood
- Silver Knight Town
- Giran
- Heine
- Ivory Tower Town
- Aden City
Visit the Caregiver to receive one Egg (1 per character). Characters must be level 10 to receive an Egg, and Eggs cannot be traded or deleted. The character will also receive a Time Card, which can be used to see in which interval your Egg last received care.
• At every interval, a character can visit the Caregiver to give care to Egg. There is no charge to apply care to the Egg.
- Care can be give to your Egg once every interval. There are 20 intervals total, each is 3 hours long.
- Each time the Egg receives care, it improves in quality
- When first receiving your Egg or getting your Egg back from the Nursery, you must wait until the next interval before applying care to your Egg.
- There are 10 levels of quality (from Hollow Shell, level 1, to Glowing Mambo Egg, level 10)
- If a character misses 4 intervals, the Egg drops one level in quality (eventually becoming a Rotten Egg). Longer periods of neglect result in a greater degradation in the Egg's quality.
- Rotten Eggs cannot receive any more care, but they can be hatched
• Eggs can be stored in the Egg Nursery to prevent loss of quality
- Talk to the Caregiver to put the Egg in the Nursery
- Characters receive an Egg Nursery Key as receipt
- There is no charge to store or recover the Egg from the Nursery
• Hatcher will offer to hatch Eggs after 20 intervals
- Higher quality Eggs have better odds of turning into more rare items