At the beginning of the game, you come across a warped dead Deku like figure. We can presume that this Deku scrub died in a horrible way. Additionally, later in the game, the Deku butler directly states that Link reminds him of his son, and he is seen weeping over the figure in the end credits. It's likely that this figure is the butler's son, and his spirit has been with you throughout the whole game.

After slashing a sign with your sword, playing the Song of Healing while near the sign will repair it. Once the song is finished, the solving a puzzle jingle plays and the sign magically repairs itself.

This same thing happens in Ocarina of Time with playing Zelda's Lullaby.

After slashing a sign with your sword in Ocarina of Time, playing Zelda's Lullaby while near the sign will repair it. Once the song is finished, the solving a puzzle jingle plays and the sign magically repairs itself.

This same thing happens in Majora's Mask with playing the Song of Healing.

After receiving the Romani's Mask, if you protect Romani's Ranch from the invaders on the First Day, and help Cremia deliver the milk to Clock Town, you'll receive 1 of 3 rewards. Link can get either a Huge Rupee (worth 200 Rupees), some Chateau Romani, or a hug.

If Link receives the hug, Cremia will hold Link up close to herself and a message will appear saying "You did it! You helped Cremia!" "You feel all warm and fuzzy! inside! Sigh... You could get used to this!" The extra exclamation point after fuzzy was removed in later versions of the game.

The five main areas mirror the five stages of grief.

Clock Town is denial; its residents continue their daily lives refusing to believe the moon will fall.

Woodfall is anger; the Deku king is trying to kill a young monkey who allegedly kidnapped his daughter.

Snowhead is bargaining; Darmani begs Link to bring him back to life.

Great Bay is depression; Mikau dies trying to save the eggs of his love interest Lulu, leaving her alone.

Ikana Valley is acceptance; the only thing Link has left to conquer is himself, facing his own grief at the loss of his friend. The friend who began the journey, Navi.

In early versions of Majora's Mask, the moon had no face. This could be why some promotional art shows the moon with no face.

The Japanese version of Majora's Mask contained three save slots as opposed to the two that the American release saw. However, in the Japanese version, the owl saving feature did not exist, making the Song of Time the only way to save. This proved to be annoying and owl saving was added to the American release, at the cost of one save slot.

Majora's Mask has the least number of dungeons of any game in the Zelda series, containing only four on the main world. While there are technically four more on the moon, they are small, contain no bosses, and are completely optional, requiring a set number of happy masks to access each one.