В субботу мы идём на стадион смотреть матч.

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Breakdown of В субботу мы идём на стадион смотреть матч.

• мы: we
• идти: to go
• смотреть: to watch

Questions & Answers about В субботу мы идём на стадион смотреть матч.

Why is it В субботу and not в суббота?

In Russian, days of the week after в take the accusative case to mean “on [day]”.

• суббота = nominative (dictionary form)
• в субботу = accusative (used with в to mean on Saturday)

So:

• в понедельник, во вторник, в среду, в субботу, etc.

Using в суббота would be grammatically wrong here.

Why does идём look like present tense if the meaning is future (on Saturday)?

Russian often uses the present tense of verbs of motion to talk about planned future actions, especially when there is a clear future time expression:

• В субботу мы идём на стадион…
  = On Saturday we’re going to the stadium… (a plan)

This is similar to English present continuous for the future:

• We are going to the stadium on Saturday.

Context (в субботу) makes it clear that it’s about the future, not right now.

What’s the difference between мы идём, мы пойдём, and мы ходим here?