This was my favorite event last year. I loved the Valentione outfit that I got from the quests and for a while, it was my character's glamour set. If you missed the announcement, you can check out the quests
here
This year, they made it the quest a little different. Like all seasonal quests, you will be requested to do a quest from each of the main cities.
You will be asked to find NPCs and deliver gifts but the twist is, unlike normal quest npcs, these won't have markers.
So, to help, here are the locations of the NPCs you need to find, based on the hints given to you.
Gridania
Frageorloix
Location: Bentbranch meadows
Coord: Central Shroud 21,21
Hints: Chocobos, Central Shroud
Ul'dah
Shashagun
Location: Horizon
Coord: Western Thanalan 23,17
Hints: Copper, Gates, King
Wowotazi
Location: BlackBrush Station
Coord: Central Thanalan 21,18
Hints: Mine, Saloon, The Sunway
Limsa Lominsa
Berndan
Location: Summerford Farms
Coord: Middle La Noscea 25,16
Hints: Fruits, Settlement, Plantation, Pirates
Thrydwulf
Location: Aleport
Coord: Western La Noscea 27,26
Hints: Lockup, Booze, The Sahagin, Tidegate
Philippe
Location: Moraby Drydocks
Coord: Lower La Noscea 25,35
Hints: Construction, Lighthouse, Salt, Ships
Once you complete these quests, you will have access to the last quest where you will be rewarded a Paramore Barding.
Hope this helps!