Days in the year

This was a code I originally started on python itself, however, I had already created a program to determine whether or not a year is a leap year or not. I figured this would be helpful because this program I created can be used to tell you how far into the year a date is. The reason it would be helpful to calculate the leap year is that 1: they don't have to know if the year was a leap year or not they can just input it, and 2: if it's a leap year, the number of days will be different.