diff --git a/src/core/watch/rtc.cpp b/src/core/watch/rtc.cpp
index de95e05..a0c82d3 100644
--- a/src/core/watch/rtc.cpp
+++ b/src/core/watch/rtc.cpp
@@ -1,7 +1,15 @@
+/**
+ * @file 
+ * @author Igor Usenko (github: igors48)
+ * @brief RTC API implementation
+*/
 #include "rtc.hpp"
 #include "ttgo.hpp"
 
-static Date rtcGetDate()
+/**
+ * @copydoc RtcApi.getDate
+ */
+static Date getDate()
 {
     RTC_Date rtcDate = watch->rtc->getDateTime();
 
@@ -25,7 +33,10 @@ static Date rtcGetDate()
     };
 }
 
-static void rtcSetDate(Date date)
+/**
+ * @copydoc RtcApi.setDate
+ */
+static void setDate(Date date)
 {
     RTC_Date rtcDate = RTC_Date(
         date.year,
@@ -41,7 +52,7 @@ static void rtcSetDate(Date date)
 RtcApi watchRtcApi()
 {
     return {
-        .getDate = rtcGetDate,
-        .setDate = rtcSetDate,
+        .getDate = getDate,
+        .setDate = setDate,
     };
 }
\ No newline at end of file
diff --git a/src/core/watch/rtc.hpp b/src/core/watch/rtc.hpp
index d61bd68..8a8c389 100644
--- a/src/core/watch/rtc.hpp
+++ b/src/core/watch/rtc.hpp
@@ -1,5 +1,13 @@
+/**
+ * @file 
+ * @author Igor Usenko (github: igors48)
+ * @brief RTC API definition
+*/
 #pragma once
 
+/**
+ * @brief definition of Date
+ */
 typedef struct
 {
     unsigned short year;
@@ -11,13 +19,26 @@ typedef struct
     unsigned int dayOfWeek;
 } Date;
 
-typedef Date (*DateFunc)(); // todo rename to GetDate #110
-typedef void (*SetDate)(Date date);
-
 typedef struct 
 {
-    DateFunc getDate;
-    SetDate setDate;
+    /**
+     * @brief returns the date from RTC
+     * 
+     * @return date value
+     */
+    Date (*getDate)();
+
+    /**
+     * @brief writes the date to RTC
+     * 
+     * @param date date value
+     */
+    void (*setDate)(Date date);
 } RtcApi;
 
+/**
+ * @brief factory for RTC API
+ * 
+ * @return RtcApi RTC API instance
+ */
 RtcApi watchRtcApi();
\ No newline at end of file