Unless my UI is completely bugged, Blizzard took the "Requires Day of the Dead" from the pet, mask, candles, and the bouquet. This means:
1. Pet is a permanent pet, and will probably soon be learnable from the item.
2. The mask is a permanent flavor mask.
3. The bouquet is a permanent flavor offhand, but only usable during event.
4. The candles are permanent, but are consumables.
This exploit is somewhat useless, but if you jump right after you select the location for a spirit candle, you don't place one, but everyone around you gains the buff for 1 minute.
It's no different than the campfire buff, in-fact a campfire refreshes this buff; BUT it's instant cast. So, if you're raiding and want a easy 4 spirit, you can use these throughout the fight.
Nothing big, or overly awesome. But cool nonetheless.