How long will my orange hair last?

It depends on you hair type but you should wash you hair in cold water and use a shampoo and conditioner specifically for color treated hair. I bleached my hair and dyed it pink I need to re-dye it every 3-4 weeks. It might still run in the shower so blow dry your hair before sleeping or putting on clothes or it could ruin them. Long term it just isn't good for your hair so i would use repairing conditioners. And it will be good until Friday.