Spanish often uses the present simple for future arrangements when English uses the present continuous.
Veo a Mary el viernes. I’m seeing Mary on Friday (NOT I see Mary on Friday)
Me voy a Madrid el viernes. I’m going to Madrid on Friday. (NOT I go to Madrid on Friday)
No vienen a la fiesta. They aren’t coming to the party. (NOT They don’t come to the party)
¿Qué haces esta tarde? What are you going to do this evening? (NOT What do you do this evening)