I need advice. The idea of the project is a web timetable.

I add the school timetable to an postgresql db and use vercel serverless functions(maybe?) to fetch them and tell me:
-what’s the next subject
-how much time left until end of class
-how much time until end of break
-how long is the break
The only way to achieve this is by using time but that might be a problem because nearest server is in Frankfurt