Freya's Day

Freya's Day is a celebration mentioned in the mini-comic Litter Sitter.

Description
Not much is known about this celebration, except that spears and shileds are needed.

Litter Sitter
Stoick asks Gobber about the spears for Freya's Day when Snotlout runs out of the Academy, followed by baby Nightmares. Walking away, Gobber says that he is also readywith some shields.