well it matters how big you are really, im 6ft 180 and i can pass piss test in 1 week if i REALLY have to..man january 5th? thats a loooong ass time, i have one january 8th, and ill be high/drunk on my friends bday party 3 days after xmas..for sure..just get drunk as much as u can, and break the seal so u can piss alllllll night...drink water

or smoke til january 4th and get a 30$ system cleaner to drink before ur test