I particularly like the last one by @DooMAD, which debates about Bitcoins specific date of birth the tenth anniversary amongst the following options: 18th August 2018 (date of bitcoin.org domain registry), 31st October 2018 (Satoshis whitepaper release) and 3rd January 2019 (genesis block mining).
Waiting to see if @ xtraelv comes around with a great historical post on the topic.