====== September – In this month ======

[[:history:en:09:start|September]] | [[:history:de:09:month|Deutsch]]

The month is sourced, but the exact day is not. These events are not attributed to a specific day.

===== 1981 =====

%%RFC 791 specifies Internet Protocol version 4. IPv4 becomes a foundation of the global Internet.%%

Source: [[https://www.rfc-editor.org/rfc/rfc791.txt]]

ID: ipv4-rfc791