Questions & Answers about Le départ du train est à huit heures.
In French, le départ du train literally means the departure of the train. The sentence is really:
- Le départ du train est à huit heures.
→ The train’s departure is at eight o’clock.
You normally wouldn’t say Le train est à huit heures, because a train is something, it doesn’t exist at a time; its departure (or journey, or arrival) is what can be at a specific time.
More natural alternatives are:
Le train part à huit heures.
→ The train leaves at eight o’clock.Le train arrive à huit heures. (if you mean arrival)
→ The train arrives at eight o’clock.
So the original sentence focuses on the event (the departure), not the train itself.