going to future

use it

to express a plan or intention	I'm going to buy a new car. John is going to book a holiday hotel. They're going to leave next week.

for a future prediction (what you expect to happen then) you may use simple future or going to	It will rain tomorrow. It's going to rain tomorrow

In many sentences there are clues that tell you:
use the future

Words like:

tomorrow, next week (month, year...),
in 2025