Timetables

In timetables and itineraries we use the present simple to refer to an actionA general term expressing that somebody or something does something which is planned and is not likely to change.

The last train to Budapest leaves at 19.50.

This is always true (as long as the timetable is valid) and so it may even refer to future time.

When does our train leave tomorrow?

Itineraries

On day 6 we visit the pyramids.

This sentence may occur in an itinerary; it has been planned and will probably not change.

Instructions

We also use the present simple tenseA grammatical category that is marked by verb inflection. To express when an event or action happens in time or when a state exists, we use tenses. in instructions (e.g. recipes, manuals). In this case the actions are or should always be performed in the same way.

First you roll out the pastry.
I've pressed ENTER. What do I do now?

Present simple for general truths
Present simple Notes: present simple