how to display time stamp, date, month and year

int sensorPin = A0<span style="box-sizing: inherit;" 
int sensorValue = 0<span style="box-sizing: inherit;" 
void setup() {

Serial.begin(9600);

}

void loop() {

// read the value from the sensor:

sensorValue = analogRead(sensorPin);

Serial.print("Moisture = " );

Serial.println(sensorValue);

delay(1000);

}

For the NTP, you can refer to https://github.com/arduino-libraries/NTPClient, here is my code.

#include
// change next line to use with another board/shield
#include
//#include // for WiFi shield
//#include // for WiFi 101 shield or MKR1000
#include

const char *ssid = "seeed";
const char *password = "*******";

WiFiUDP ntpUDP;

// You can specify the time server pool and the offset (in seconds, can be
// changed later with setTimeOffset() ). Additionaly you can specify the
// update interval (in milliseconds, can be changed using setUpdateInterval() ).
NTPClient timeClient(ntpUDP, "cn.pool.ntp.org", 28800, 60000);
const int analogInPin = A0; // Analog input pin that the potentiometer is attached to
int sensorValue = 0; // value read from the pot

void setup(){
Serial.begin(115200);

WiFi.begin(ssid, password);

while ( WiFi.status() != WL_CONNECTED ) {
delay ( 500 );
Serial.print ( "." );
}

timeClient.begin();
}

void loop() {
timeClient.update();

Serial.print(timeClient.getFormattedTime());
Serial.print(": ");
sensorValue = analogRead(analogInPin);
Serial.print("sensor = ");
Serial.println(sensorValue);
// wait ten seconds before asking for the time again

delay(1000);
}

here is the output:

15:02:24: sensor = 9
15:02:25: sensor = 9
15:02:26: sensor = 9
15:02:27: sensor = 9
15:02:28: sensor = 9
15:02:29: sensor = 15
15:02:30: sensor = 15
15:02:31: sensor = 15
15:02:32: sensor = 9
15:02:33: sensor = 9
15:02:34: sensor = 15
15:02:35: sensor = 15
15:02:36: sensor = 9