Song of Time

• from The Legend of Zelda: Majora's Mask

Melody: Right-A-Down-Right-A-Down
Location: You get it in the first 3-day while you are on the Clock Tower.
Purpose: Start the 3 days over.

• from The Legend of Zelda: Ocarina of Time

How to play it: Right-A-Down-Right-A-Down
Use: Will open the passage to the Temple of Time, also can make large blue blocks appear or disappear.
How to Get it: Zelda teaches it to you automatically. (Young Link)