Midnight – la medianoche
(Pronounced meh-dee-oh-noh-cheh)
To remember that midnight is pronounced meh-dee-oh-noh-cheh (medianoche) in Spanish, use the following mnemonic:
At midnight, you must check his pills. Last night, the meds he had were not checked (madianoche) and he turned into a werewolf.

Medianoche is feminine, so it's la medianoche. Imagine a lady running from the ball at midnight like Cinderella.

Examples of medianoche (midnight) in a sentence
El tren llega a medianoche, así que no te duermas.
(The train arrives at midnight, so don't fall asleep.)
Siempre me despierto a medianoche sin razón.
(I always wake up at midnight for no reason.)
La fiesta terminó a medianoche y todos se fueron a casa.
(The party ended at midnight and everyone went home.)