Here's a breakdown of the phrase:
* Vamos: This is the imperative form of "ir" (to go), meaning "let's" or "we're going to."
* a ver: This phrase means "let's see," indicating uncertainty or a willingness to adapt.
* que hacemos: This is the present tense of "hacer" (to do), asking what we will do.
* en ese dia: This means "that day," referring to a specific future day.
Therefore, the whole phrase expresses an open and flexible approach to planning, suggesting that the speaker is unsure what they will do on that specific day but is open to possibilities.