diff --git a/README.md b/README.md
index bc11b65..bbcc584 100644
--- a/README.md
+++ b/README.md
@@ -190,6 +190,12 @@ underflow. Used by STM32LoRaWAN.
 Refer to the Arduino RTC documentation for the other functions
 http://arduino.cc/en/Reference/RTC
 
+### Since STM32RTC version higher than 1.4.0
+_IsFormat_24Hour_
+
+Returns True if the current Hour Format is HOUR_24 else false if Hour format is HOUR_12
+
+
 ## Source
 
 Source files available at:
diff --git a/src/STM32RTC.h b/src/STM32RTC.h
index fe0374c..e7c9611 100644
--- a/src/STM32RTC.h
+++ b/src/STM32RTC.h
@@ -240,6 +240,10 @@ class STM32RTC {
     {
       return RTC_IsConfigured();
     }
+    bool isFormat_24hour(void)
+    {
+      return (_format == HOUR_24);
+    }
     bool isAlarmEnabled(Alarm name = ALARM_A);
     bool isTimeSet(void)
     {