1st Day of January – Fatcowco – 1983 – the TCP/IP internet begins

1983 – TCP/IP, the Internet Protocol id introduced, effectively creating the Internet

The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries.

On 1st of January,  1383 the ARPANET officially changes to using TCP/IP, the Internet Protocol, effectively creating the Internet.

Source: 1st Day of January – Fatcowco