DO NOT CONNECT DISPLAY TO 5V! Data pins pulled-up to VCC, ESP8266 not tolerant to 5V!
Wifi manager will help you to connect your device to network. Change NTP server to nearest to you, set timezone shift to your local.
Current sources for ESP-12, if you want use ESP-01 change pins defines to:
#define CLK D3 // IO0 #define DIO D9 // RX