diff --git a/src/main/java/org/jboss/logmanager/handlers/PeriodicRotatingFileHandler.java b/src/main/java/org/jboss/logmanager/handlers/PeriodicRotatingFileHandler.java
index 02d45e9e..f4894fb2 100644
--- a/src/main/java/org/jboss/logmanager/handlers/PeriodicRotatingFileHandler.java
+++ b/src/main/java/org/jboss/logmanager/handlers/PeriodicRotatingFileHandler.java
@@ -217,7 +217,8 @@ private void calcNextRollover(final long fromTime) {
             case YEAR:
                 calendar.set(Calendar.MONTH, 0);
             case MONTH:
-                calendar.set(Calendar.DAY_OF_MONTH, 0);
+                // Needs to be set to the first day of the month
+                calendar.set(Calendar.DAY_OF_MONTH, 1);
                 calendar.clear(Calendar.WEEK_OF_MONTH);
             case WEEK:
                 if (period == Period.WEEK) {