Init commit with many years of arduino sketches and projects. I dont know if the esp8266 includes much, but there are also libraries. I hope they dont have crazy automatic versioning through the Arduino IDE.

Projects/libraries/Installed_libs/Time/Examples/TimeRTC/TimeRTC.pde

@@ -0,0 +1,47 @@
+/*
+ * TimeRTC.pde
+ * example code illustrating Time library with Real Time Clock.
+ * 
+ */
+
+#include <Time.h>  
+#include <Wire.h>  
+#include <DS1307RTC.h>  // a basic DS1307 library that returns time as a time_t
+
+void setup()  {
+  Serial.begin(9600);
+  setSyncProvider(RTC.get);   // the function to get the time from the RTC
+  if(timeStatus()!= timeSet) 
+     Serial.println("Unable to sync with the RTC");
+  else
+     Serial.println("RTC has set the system time");      
+}
+
+void loop()
+{
+   digitalClockDisplay();  
+   delay(1000);
+}
+
+void digitalClockDisplay(){
+  // digital clock display of the time
+  Serial.print(hour());
+  printDigits(minute());
+  printDigits(second());
+  Serial.print(" ");
+  Serial.print(day());
+  Serial.print(" ");
+  Serial.print(month());
+  Serial.print(" ");
+  Serial.print(year()); 
+  Serial.println(); 
+}
+
+void printDigits(int digits){
+  // utility function for digital clock display: prints preceding colon and leading 0
+  Serial.print(":");
+  if(digits < 10)
+    Serial.print('0');
+  Serial.print(digits);
+}
+