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April Fools' RFCs Overview

Jul 12, 2025

Overview

April Fools' Day RFCs are humorous or satirical technical documents published, usually by the IETF, to parody Internet-related protocols and standards. Since 1989, this tradition has provided an annual outlet for creativity and satire in the technical community.

Purpose and History of April Fools' Day RFCs

  • April Fools' Day RFCs are spoof or joking RFCs published nearly every April 1st since 1989.
  • The tradition was inspired by earlier humorous RFCs, such as 1973's ARPAWOCKY.
  • These RFCs parody technical protocols, networking concepts, or cultural trends in Internet engineering.

Notable April Fools' Day RFC Examples

  • RFC 1149 proposed transmitting IP packets via homing pigeon, later "implemented" by enthusiasts.
  • RFC 1925 outlined the "Twelve Networking Truths," a satirical look at Internet realities.
  • RFC 2324 defined the Hyper Text Coffee Pot Control Protocol (HTCPCP), including the "I'm a teapot" HTTP code.
  • RFC 3514 introduced the "evil bit" in IPv4 headers, parodying simple technical fixes for complex problems.
  • RFC 6214 adapted the pigeon IP protocol for IPv6.
  • RFC 4042 humorously defined fictional UTF-9 and UTF-18 Unicode formats.
  • RFC 9405 presented an AI Sarcasm Detection Protocol.

Other Humorous RFCs

  • RFC 439 documented a conversation between two early chatbots, parodying Turing tests.
  • RFC 527 parodied Lewis Carroll's Jabberwocky in network style.
  • RFC 2410 outlined the "NULL Encryption Algorithm" as a joke proposal.

Submission Guidelines for April Fools' Day RFCs

  • Submissions are accepted from anyone if received at least two weeks before April 1.
  • The RFC Editor acknowledges the tradition and provides guidance with a humorous note in the instructions.

Key Takeaways

  • April Fools' RFCs provide comic relief and cultural commentary within the technical standards community.
  • While not meant for implementation, some have inspired real-world experiments.
  • The collection reflects both technical and social aspects of Internet development and community humor.