diff --git a/2017/day1.py b/2017/day01.py similarity index 100% rename from 2017/day1.py rename to 2017/day01.py diff --git a/2017/day2.py b/2017/day02.py similarity index 100% rename from 2017/day2.py rename to 2017/day02.py diff --git a/2017/day3.py b/2017/day03.py similarity index 100% rename from 2017/day3.py rename to 2017/day03.py diff --git a/2017/day4.py b/2017/day04.py similarity index 100% rename from 2017/day4.py rename to 2017/day04.py diff --git a/2017/day5.py b/2017/day05.py similarity index 100% rename from 2017/day5.py rename to 2017/day05.py diff --git a/2017/day6.py b/2017/day06.py similarity index 100% rename from 2017/day6.py rename to 2017/day06.py diff --git a/2017/day7.py b/2017/day07.py similarity index 100% rename from 2017/day7.py rename to 2017/day07.py diff --git a/2017/day8.py b/2017/day08.py similarity index 100% rename from 2017/day8.py rename to 2017/day08.py diff --git a/2017/day9.py b/2017/day09.py similarity index 100% rename from 2017/day9.py rename to 2017/day09.py