[3] RFC 1459 - Internet Relay Chat Protocol, 2021-04-11T07:15:29.000Z, 2021-04-13T03:29:22.449Z https://tools.ietf.org/html/rfc1459#section-4.3.4

[1] RFC 1459 - Internet Relay Chat Protocol, 2021-04-11T07:15:29.000Z, 2021-04-13T03:28:41.759Z https://tools.ietf.org/html/rfc1459#page-52

[2] RFC 1459 - Internet Relay Chat Protocol, 2021-04-11T07:15:29.000Z, 2021-04-13T03:28:59.632Z https://tools.ietf.org/html/rfc1459#page-54

[5] RFC から読めない IRC, 2021-04-13T03:36:24.000Z https://yoshino.tripod.com/73th/data/irccode.htm#ctcp_application_time

[6] RFC 2812 - Internet Relay Chat: Client Protocol, 2021-04-11T07:44:32.000Z, 2021-04-13T03:49:06.510Z https://tools.ietf.org/html/rfc2812#section-3.4.6

[7] RFC 2812 - Internet Relay Chat: Client Protocol, 2021-04-11T07:44:32.000Z, 2021-04-13T03:51:47.216Z https://tools.ietf.org/html/rfc2812#page-51

[4] `server-time` Extension - IRCv3, IRCv3 Working Group, 2021-04-13T03:32:18.000Z https://ircv3.net/specs/extensions/server-time