There probably will be some tanabata event, knowing it was important in XI, and the game is japaneese... what i woud like to see as seasonal events?
well i would love class based events, like harvest event for botanist in summer, warm hats crafting event for weavers in winter and so on. Winter event could be multiclass, like weavers craft hats, botanists log for fire wood, alhemist make pills for cold, and such.