How many hours or days do you need to go through the park, during Holy Week?

If you arrive early, since they open the park, you go through it in a day

Going through the park, climbing all the games and going to some shows with the "fast economic pass" (I do not remember what it's called, you can go up to all the games only once) with one day is enough, but because it is Holy week will be very full, maybe you will not reach the day nor with the pass.

Early in a day

Depends on the day is the time they open it check it on the internet and in Easter there are more people due to the holidays but you can buy a pass to enter faster without queuing