Learn Russian: Что ты делаешь завтра вечером?

Just like in English when we say "What are you doing tomorrow?", Russian often uses the present tense to talk about future plans or scheduled events. You don't always need to use a future tense verb when a time word like завтра is already making the timeframe clear.

Why is the word for evening вечером here instead of just вечер?

The dictionary word for "evening" is вечер. To say "in the evening", Russian changes the ending to make it вечером. This uses a grammar form called the Instrumental case, which is commonly used with parts of the day (утром, днём, вечером, ночью) to answer the question "when?".

Is "tomorrow evening" always put in this exact order (завтра вечером)?

Generally, yes! In Russian time expressions, it is most natural to state the broader day first (завтра - tomorrow), followed by the specific part of the day (вечером - in the evening).

Quick refresher: why does the verb end in -ешь?