Marathon Week usually takes place during the last week of May, and during marathon week all liquids must contain alcohol. You start drinking once you wake up on the last Monday of May and you cannot drink anything but liquids containing alcohol until the last day of May (unless you have to due to a medical emergency).
You cannot drink ANYTHING that does not have alcohol in it AT ALL! YOU MUST DRINK ALCOHOL TO BE PART OF MARATHON WEEK!
Be warned Marathon Week is not for the weak of liver.