diff --git a/NightLight.Core.Tests/TimeChangedGenerators.fs b/NightLight.Core.Tests/TimeChangedGenerators.fs
index 4769474..7ab279a 100644
--- a/NightLight.Core.Tests/TimeChangedGenerators.fs
+++ b/NightLight.Core.Tests/TimeChangedGenerators.fs
@@ -4,7 +4,7 @@ open System
 open FsCheck.FSharp
 
 let private isDay (time: DateTime) =
-    time.TimeOfDay >= TimeSpan.FromHours 5.5
+    time.TimeOfDay >= TimeSpan.FromHours 6
     && time.TimeOfDay < TimeSpan.FromHours 20.5
 
 let private isTimeChangedMeetingCondition condition interaction =
diff --git a/NightLight.Core/PartsOfDay.fs b/NightLight.Core/PartsOfDay.fs
index 8cfc3c3..ac430f4 100644
--- a/NightLight.Core/PartsOfDay.fs
+++ b/NightLight.Core/PartsOfDay.fs
@@ -9,7 +9,7 @@ type PartOfDay =
 let getPartOfDay (dateTime: DateTime) =
     match dateTime with
     | _ when
-        dateTime.TimeOfDay >= TimeSpan.FromHours 5.5
+        dateTime.TimeOfDay >= TimeSpan.FromHours 6
         && dateTime.TimeOfDay < TimeSpan.FromHours 20.5
         ->
         Day
diff --git a/README.md b/README.md
index b70f026..56a365b 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 This is an F# program that turns all the lights in our apartment
 
 * _red_ at 8.30pm in the evening, and
-* _white_/_yellow_ (depending on the room) at 5.30am in the morning.
+* _white_/_yellow_ (depending on the room) at 6.00am in the morning.
 
 `NightLight.Core` is the functional core, and `NightLight` is the imperative shell.