diff --git a/sonoff/_changelog.ino b/sonoff/_changelog.ino
index da3db4570..21e00702e 100644
--- a/sonoff/_changelog.ino
+++ b/sonoff/_changelog.ino
@@ -2,6 +2,7 @@
  * Add command RGBWWTable to support color calibration (#3933)
  * Add support for Michael Haustein ESP Switch
  * Add support for EXS Relay V5.0 (#3810)
+ * Fix timer offset -00:00 causing 12:00 hour offset (#3923)
  *
  * 6.2.1.9 20180928
  * Add Apparent Power and Reactive Power to Energy Monitoring devices (#251)
diff --git a/sonoff/xdrv_09_timers.ino b/sonoff/xdrv_09_timers.ino
index 66bf93614..124b41534 100644
--- a/sonoff/xdrv_09_timers.ino
+++ b/sonoff/xdrv_09_timers.ino
@@ -194,7 +194,7 @@ void ApplyTimerOffsets(Timer *duskdawn)
 
   // apply offsets, check for over- and underflows
   uint16_t timeBuffer;
-  if ((uint16_t)stored.time > 720) {
+  if ((uint16_t)stored.time > 719) {
     // negative offset, time after 12:00
     timeBuffer = (uint16_t)stored.time - 720;
     // check for underflow