Oddly during questing we have a Pirate Pumpkin and a Clover Leaf wand in our back packs, not sure where the pumpkin came from but think the wand came from Trial of Spheres? I don't remember collecting off holiday items while not around that holiday before. This was recent questing right after the last batch of updates where all our houses are crated up and have to reload.
Maybe a glitch? Normally holiday items are only available for drops around the holiday they are for.
As others have said, it is only available at Halloween. Then you can also buy it from Spooky Bob in the shopping area.
If you must have it now, you could try buying the nightmare packs during Pack a Palooza, as it is possible to get it there -- although buying packs is a gamble, you never know for sure what you will get.