Gjoub? Hmm, now that's funny! However, this ritual will not, work. But no means, should you try. Yes, it seems harsh, but is it really? Think of it. You want to basically call on a entity, or spirit, who is named "gjoub". I'm sorry, but I don't know who this person, is!
If you still want to go through a ritual, please think it through. What do you prefer? I love doing my rituals in the morning, but Some, not all are held in the evening. So It's up to you.