ESP8266 12E V1 and the internet time data using world clock client library and printing display it to an OLED user interface (0.96 inch) 64x128 pixel. ESP8266 12E to fetch data by frame wise and serve it to users connected to WiFi network. The time zone location IDs taken from www.IBM.com.
 
 Refer Blog for more details. 
https://www.dofbot.com/post/nodemcu-world-clock
 
Demo video:
https://www.youtube.com/watch?v=9ssLGUv0XFg