Tweeted By @goodfellow_ian
The current XKCD ( https://t.co/uUKeARZNX9 ) jokingly proposes a time system where the length of a second changes throughout the year. Fun fact: there really was a time system like this: https://t.co/68SgNsKUiV
— Ian Goodfellow (@goodfellow_ian) September 26, 2018