You must have the libs:

• Adafruit RTCLib
• Arduino NTP Client

You can install from Arduino/ Manage Libraries menu

Copy WifiPass.h.config to WifiPass.h and change the ssid and password to your wifi network information.

Change the NTP_SERVER to a suitable server.

#define NTP_SERVER "0.us.pool.ntp.org"

Change the GMT time zone GMT_TIME_ZONE you can add a signed number

#define GMT_TIME_ZONE -7

You can force the time sync after the first time changing the FORCE_RTC_UPDATE to a random number between 0-255

#define FORCE_RTC_UPDATE 2