Start index for iterating Python list

You can use slicing:

for item in some_list[2:]:
    # do stuff

This will start at the third element and iterate to the end.

You can always loop using an index counter the conventional C style looping:

for i in range(len(l)-1):
    print l[i+1]

It is always better to follow the "loop on every element" style because that's the normal thing to do, but if it gets in your way, just remember the conventional style is also supported, always.

islice has the advantage that it doesn't need to copy part of the list

from itertools import islice
for day in islice(days, 1, None):
    ...