Why did my Russian not eat for weeks and now he eats everything

[NOTASPAMBOT]

My Russian tortoise was sleepy and would not eat anything for weeks. Like literally i never noticed him eating anything. Now he's woken up and he seems to eat a lot. Why? Was he hibernating? But it's summer here

 

[Blackdog1714]

1. How long have you had him
2. What are his temps-basking, overall, coolspot
3. what kind of substrate
4. Lights- UVB, ambient, heat type?
Welcome and please include pictures