# Why we use the present simple for itineraries?

As far as I know, when we use the present simple for future, generally it is used for public future schedules that we have no control over, such as, transportation schedules. So I don't understand why the tense can also be used for itineraries. Here are two samples in "Complete English as a Foreign":

1. A secretary is telling her boss his itinerary for a business trip next week: you arrive Endinburgh at 11.00. You have a lunch meeting with Mr Jone at 12.30 and then at 3.30 you take the train to Glasgow.

2. A travel agent's assistant is talking to his customer about his itinerary: you fly to Naples with Alitalia on the 12th of next month. When you get to Naples a coach picks you up form the airport and they drive you to your hotel. Next morning the coach takes you on excursion to...

For two samples above, I don't think they are public events and so unchangeable as ones in public transportation schedules. So I hope native speakers can tell me why the present simple can be used for itineraries and whether the present continuous and the present simple are exchangeable in the samples.

• Itineraries are one place we use the simple present for future, but not the only one. // Even if the schedule is prepared for just one person, that schedule is still quite similar to an official group itinerary. // Yes, you could substitute the continuous, but it would get tedious if you tried to do that for each and every verb. Commented May 1, 2019 at 6:35
• Thank you! One more question, here is another sample of itineraries: We arrive in Paris at 13.00. We spend two hours in Paris and leave again at 15.00... Suppose a man wants to tell his friend in Paris that he won't be visiting him after knowing the above interary form his travel agent, I wonder he should choose the present continuous or the present simple with verbs in his explanation, i.e.: 1) We are only spending two hours in Paris. So we can't visit you. 2) We only spend two hour in Paris. So we can't visit you. Commented May 2, 2019 at 3:09
• Bob, both (1) and (2) work in that context, with (1) preferred. Commented May 2, 2019 at 13:06