diff --git a/days/input/day1_input b/days/input/day01_input
similarity index 100%
rename from days/input/day1_input
rename to days/input/day01_input
diff --git a/days/input/day2_input b/days/input/day02_input
similarity index 100%
rename from days/input/day2_input
rename to days/input/day02_input
diff --git a/days/input/day3_input b/days/input/day03_input
similarity index 100%
rename from days/input/day3_input
rename to days/input/day03_input
diff --git a/days/input/day5_input b/days/input/day05_input
similarity index 100%
rename from days/input/day5_input
rename to days/input/day05_input
diff --git a/days/input/day6_input b/days/input/day06_input
similarity index 100%
rename from days/input/day6_input
rename to days/input/day06_input
diff --git a/days/input/day7_input b/days/input/day07_input
similarity index 100%
rename from days/input/day7_input
rename to days/input/day07_input
diff --git a/days/input/day8_input b/days/input/day08_input
similarity index 100%
rename from days/input/day8_input
rename to days/input/day08_input
diff --git a/days/input/day9_input b/days/input/day09_input
similarity index 100%
rename from days/input/day9_input
rename to days/input/day09_input
diff --git a/days/test_day1.py b/days/test_day01.py
similarity index 84%
rename from days/test_day1.py
rename to days/test_day01.py
index 691c1cc..be7e628 100644
--- a/days/test_day1.py
+++ b/days/test_day01.py
@@ -1,7 +1,7 @@
 import os
 
 
-inputfile = os.path.join(os.path.dirname(__file__), "input/day1_input")
+inputfile = os.path.join(os.path.dirname(__file__), "input/day01_input")
 
 
 def calc_fuel(mass):
diff --git a/days/test_day2.py b/days/test_day02.py
similarity index 83%
rename from days/test_day2.py
rename to days/test_day02.py
index 4017400..2864e78 100644
--- a/days/test_day2.py
+++ b/days/test_day02.py
@@ -3,7 +3,7 @@ import os
 from . import OpcodeComputer
 
 
-inputfile = os.path.join(os.path.dirname(__file__), "input/day2_input")
+inputfile = os.path.join(os.path.dirname(__file__), "input/day02_input")
 
 
 def test_day2a():
diff --git a/days/test_day3.py b/days/test_day03.py
similarity index 91%
rename from days/test_day3.py
rename to days/test_day03.py
index 1cf1cfa..cea9f32 100644
--- a/days/test_day3.py
+++ b/days/test_day03.py
@@ -2,7 +2,7 @@ import os
 import sys
 
 
-inputfile = os.path.join(os.path.dirname(__file__), "input/day3_input")
+inputfile = os.path.join(os.path.dirname(__file__), "input/day03_input")
 
 
 def draw_path(inst):
diff --git a/days/test_day4.py b/days/test_day04.py
similarity index 100%
rename from days/test_day4.py
rename to days/test_day04.py
diff --git a/days/test_day5.py b/days/test_day05.py
similarity index 75%
rename from days/test_day5.py
rename to days/test_day05.py
index bb1991e..5e7831b 100644
--- a/days/test_day5.py
+++ b/days/test_day05.py
@@ -3,7 +3,7 @@ import os
 from . import OpcodeComputer
 
 
-inputfile = os.path.join(os.path.dirname(__file__), "input/day5_input")
+inputfile = os.path.join(os.path.dirname(__file__), "input/day05_input")
 
 
 def test_day5a():
diff --git a/days/test_day6.py b/days/test_day06.py
similarity index 98%
rename from days/test_day6.py
rename to days/test_day06.py
index 035fe4c..19b8ef5 100644
--- a/days/test_day6.py
+++ b/days/test_day06.py
@@ -3,7 +3,7 @@ from typing import Dict
 
 
 def get_code() -> Dict[str, str]:
-    inputfile = os.path.join(os.path.dirname(__file__), "input/day6_input")
+    inputfile = os.path.join(os.path.dirname(__file__), "input/day06_input")
     with open(inputfile) as fp:
         return {x[1].rstrip(): x[0] for x in
                 (y.split(')') for y in fp.readlines())}
diff --git a/days/test_day7.py b/days/test_day07.py
similarity index 93%
rename from days/test_day7.py
rename to days/test_day07.py
index 1326a44..2932252 100644
--- a/days/test_day7.py
+++ b/days/test_day07.py
@@ -4,7 +4,7 @@ import os
 from . import OpcodeComputer
 
 
-inputfile = os.path.join(os.path.dirname(__file__), "input/day7_input")
+inputfile = os.path.join(os.path.dirname(__file__), "input/day07_input")
 
 
 def test_day7a():
diff --git a/days/test_day8.py b/days/test_day08.py
similarity index 94%
rename from days/test_day8.py
rename to days/test_day08.py
index 3fff431..963fce8 100644
--- a/days/test_day8.py
+++ b/days/test_day08.py
@@ -6,7 +6,7 @@ imgsize = 25 * 6
 
 
 def get_image():
-    inputfile = os.path.join(os.path.dirname(__file__), "input/day8_input")
+    inputfile = os.path.join(os.path.dirname(__file__), "input/day08_input")
     with open(inputfile) as fp:
         img = [int(k) for k in str(fp.readline())]
     breaks = [imgsize*k for k in range(len(img)//imgsize+1)]
diff --git a/days/test_day9.py b/days/test_day09.py
similarity index 77%
rename from days/test_day9.py
rename to days/test_day09.py
index 7906aeb..29f63d7 100644
--- a/days/test_day9.py
+++ b/days/test_day09.py
@@ -4,7 +4,7 @@ import os
 from .comp import OpcodeComputer
 
 
-inputfile = os.path.join(os.path.dirname(__file__), "input/day9_input")
+inputfile = os.path.join(os.path.dirname(__file__), "input/day09_input")
 
 
 def test_day9a():