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/TimeSerialDateStrings/TimeSerialDateStrings.pde

@@ -0,0 +1,80 @@
+/* 
+ * TimeSerialDateStrings.pde
+ * example code illustrating Time library date strings
+ *
+ * This sketch adds date string functionality to TimeSerial.pde
+ * 
+ */ 
+ 
+#include <Time.h>  
+
+#define TIME_MSG_LEN  11   // time sync to PC is HEADER followed by unix time_t as ten ascii digits
+#define TIME_HEADER  'T'   // Header tag for serial time sync message
+#define TIME_REQUEST  7    // ASCII bell character requests a time sync message 
+
+void setup()  {
+  Serial.begin(9600);
+  setSyncProvider( requestSync);  //set function to call when sync required
+  Serial.println("Waiting for sync message");
+}
+
+void loop(){    
+  if(Serial.available() ) 
+  {
+    processSyncMessage();
+  }
+  if(timeStatus()!= timeNotSet) 
+  {
+    digitalClockDisplay();  
+  }
+  delay(1000);
+}
+
+void digitalClockDisplay(){
+  // digital clock display of the time
+  Serial.print(hour());
+  printDigits(minute());
+  printDigits(second());
+  Serial.print(" ");
+  Serial.print(dayStr(weekday()));
+  Serial.print(" ");
+  Serial.print(day());
+  Serial.print(" ");
+  Serial.print(monthShortStr(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);
+}
+
+void processSyncMessage() {
+  // if time sync available from serial port, update time and return true
+  while(Serial.available() >=  TIME_MSG_LEN ){  // time message consists of a header and ten ascii digits
+    char c = Serial.read() ; 
+    Serial.print(c);  
+    if( c == TIME_HEADER ) {       
+      time_t pctime = 0;
+      for(int i=0; i < TIME_MSG_LEN -1; i++){   
+        c = Serial.read();          
+        if( c >= '0' && c <= '9'){   
+          pctime = (10 * pctime) + (c - '0') ; // convert digits to a number    
+        }
+      }   
+      setTime(pctime);   // Sync Arduino clock to the time received on the serial port
+    }  
+  }
+}
+
+time_t requestSync()
+{
+  Serial.print(TIME_REQUEST,BYTE);  
+  return 0; // the time will be sent later in response to serial mesg
+}
+