- "That's the All-Night Mask, isn't it? That looks like an expensive mask."
- — Happy Mask Salesman
The All-Night Mask (夜更かしのお面, Yofukashi no Omen?) is one of the twenty-four masks that Link can collect in The Legend of Zelda: Majora's Mask. It has the unusual power to keep its wearer awake forever.
According to a Gossip Stone, the All-Night Mask is a torture device used to induce insomnia for the person bearing the mask.
Link can purchase the All-Night Mask at the Curiosity Shop for 500 Rupees on the Final Day, assuming he prevented Sakon from robbing the Old Lady from Bomb Shop in North Clock Town on the Night of the First Day. Due to the price, Link must also have acquired the Giant's Wallet in order to purchase it. Anju's Grandmother rewards Link with two Pieces of Heart if Link uses the All-Night Mask to stay awake for the duration of her long stories and give a particular response to her questions afterward. After the first story, Link must answer her question correctly, and after the second story, he must say he does not know. Link has no more uses for this mask other than giving it to the children on the moon when he goes there to face Majora.