Do not use random, it is not idempotent.

templates/galaxy.yml.j2

@@ -8,7 +8,7 @@ on:
     tags:
       - '*'
   schedule:
-    - cron: '{{ 59 | random }} {{ 23 | random }} {{ letter_day_mapping[role_name[:1]] + 1 }} * *'
+    - cron: '{{ letter_minute_mapping[role_name[2]] }} {{ letter_hour_mapping[role_name[2]] }} {{ letter_day_mapping[role_name[:1]] + 1 }} * *'
 
 jobs:
   release:

templates/molecule-action.yml.j2

@@ -9,7 +9,7 @@ on:
       - '*'
   pull_request:
   schedule:
-    - cron: '{{ 59 | random }} {{ 23 | random }} {{ letter_day_mapping[role_name[:1]] }} * *'
+    - cron: '{{ letter_minute_mapping[role_name[2]] }} {{ letter_hour_mapping[role_name[2]] }} {{ letter_day_mapping[role_name[:1]] + 1 }} * *'
 
 jobs:
   lint:

vars/main.yml

@@ -114,3 +114,79 @@ letter_day_mapping:
   7: 27
   8: 27
   9: 27
+
+letter_hour_mapping:
+  a: 1
+  b: 2
+  c: 3
+  d: 4
+  e: 5
+  f: 6
+  g: 7
+  h: 8
+  i: 9
+  j: 10
+  k: 11
+  l: 12
+  m: 13
+  n: 14
+  o: 15
+  p: 16
+  q: 17
+  r: 18
+  s: 19
+  t: 20
+  u: 21
+  v: 22
+  w: 22
+  x: 22
+  y: 22
+  z: 22
+  0: 23
+  1: 23
+  2: 23
+  3: 23
+  4: 23
+  5: 23
+  6: 23
+  7: 23
+  8: 23
+  9: 23
+
+letter_minute_mapping:
+  a: 1
+  b: 2
+  c: 3
+  d: 4
+  e: 5
+  f: 6
+  g: 7
+  h: 8
+  i: 9
+  j: 10
+  k: 11
+  l: 12
+  m: 13
+  n: 14
+  o: 15
+  p: 16
+  q: 17
+  r: 18
+  s: 19
+  t: 20
+  u: 21
+  v: 23
+  w: 24
+  x: 25
+  y: 26
+  z: 27
+  0: 28
+  1: 29
+  2: 30
+  3: 31
+  4: 32
+  5: 33
+  6: 34
+  7: 35
+  8: 36
+  9: 37