Just more clarification and documentation. IFTTT screenshots.

automation/late_night_helper.yaml

@@ -24,8 +24,8 @@
         entity_id: sun.sun
         state: 'below_horizon'
       - condition: time
-        after: '20:00'
+        after: '20:00:00'
-        before: '02:00'
+        before: '02:00:00'
 
   action:
     - service: light.turn_on

script/ifttt_notify.yaml

@@ -6,6 +6,8 @@
       # value1: 'Startup: Home Assistant is Up and Running!'
       # value2: ''
       # value3: "{{ trigger.to_state.state }}"
+      
+    # IFTTT Maker channel should look like this: https://files.gitter.im/home-assistant/home-assistant/phkx/blob
 ######################################################################################################
 
 ifttt_notify: