The simple present is used to make statements about events at a time later than now, when the statements are based on present facts, and when these facts are something fixed like a time-table, schedule, calendar.
The plane arrives at 18.00 tomorrow.
She has a yoga class tomorrow morning.
The restaurant opens at 19.30 tonight.
Next Thursday at 14.00 there is an English exam.
Note the difference between:
The plane leaves in ten minutes (= statement of fact)
The plane’s going to leave in ten minutes (= prediction based on present situation, meaning “…and if you don’t hurry up you’re going to miss it!”)
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