diff --git a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/scheduledjobs/domain/ScheduledJobs.kt b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/scheduledjobs/domain/ScheduledJobs.kt
index dc41f1d..ef42da4 100644
--- a/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/scheduledjobs/domain/ScheduledJobs.kt
+++ b/src/main/kotlin/org/domaindrivenarchitecture/provs/framework/ubuntu/scheduledjobs/domain/ScheduledJobs.kt
@@ -9,7 +9,9 @@ import org.domaindrivenarchitecture.provs.framework.ubuntu.scheduledjobs.infrast
  * ATTENTION: Use with care!! System will be shut down, restart might not succeed in all cases.
  */
 fun Prov.scheduleMonthlyReboot() = task {
-    // reboot each first Tuesday a month - see https://blog.healthchecks.io/2022/09/schedule-cron-job-the-funky-way/
+    // reboot each first Tuesday a month - see also https://blog.healthchecks.io/2022/09/schedule-cron-job-the-funky-way/
+    // Day of month field "*/100,1-7" means “every 100 days starting from date 1, and also on dates 1-7”.
+    // Since there are no months with 100 days, this means “on dates 1 to 7” that are also (in this case) Tuesdays, which is exactly each first Tuesday in a month..
     val schedule = "0 2 */100,1-7 * TUE"
     createCronJob("50_monthly_reboot", schedule, "/sbin/shutdown", "-r now", "root")
 }
diff --git a/src/main/resources/version.txt b/src/main/resources/version.txt
index 3ffcb2c..a94225a 100644
--- a/src/main/resources/version.txt
+++ b/src/main/resources/version.txt
@@ -1 +1 @@
-0.40.4-SNAPSHOT
\ No newline at end of file
+0.40.6-SNAPSHOT
\ No newline at end of file