What does "tomorrow night" mean in English for Spanish?

In English for Spanish, "tomorrow night" means:

mañana por la noche

Listen to "tomorrow night": (If you have an HTML5 enabled browser, you can listen to the native audio below)

This is a phrase that is used in the GamesForLanguage English for Spanish Language Game in the following scenes:

• English for Spanish 4, Level 3, Scene 4