If you have an ESP8266, there’s a code library which lets you query an NTP server. You basically setup your Arduino to communicate with the ESP via serial and use some of the following code to query an NTP server.
Good but with this I must disconnect from blynk and run this sketch, I think the hour and date already pass between server and arduino, just to reveal it and pass these values from a function
Shure but with Blink.GetTime() or similar is more easy and It uses existing data, almost certainly the messages that are exchanged with the server contains a timestamp that can be used