The 12 Days Of Christmas
If you take the song "The 12 Days of Christmas" literally, on the 1st day you would receive 1 gift, on the 2nd day you would receive 2+1=3, on the 3rd day you'd receive 3+2+1=6, etc. Let's say this gift-giving process started on December 13 so that the dramatic "12th Day of Christmas" arrived on December 25. If, starting on December 26, you wanted to return all those gifts, but could only return item per day, on what date the following year would you finish? (Assume not a leap year).