4 January in internet history

Things that can be dated to 4 January: the day something was posted, a record that changed hands, an event research has pinned to a date. Every entry links to where it was read.

1. 2012

   Cicada 3301 The first puzzle is posted. It runs for nearly a month. Wikipedia — Cicada 3301

2. 2013

   Cicada 3301 A second begins. Wikipedia — Cicada 3301

3. 2014

   Cicada 3301 A third is posted on Twitter. Wikipedia — Cicada 3301

4. 2019

   Instagram egg The egg is posted, with the stated aim of beating the 18 million likes on a photograph by Kylie Jenner. Wikipedia — Instagram egg