今天更新了github的学生认证，更细完成后有了如下提示：
最后两个单词Octotastic Day是什么意思？
搜索到的解释为：
It comes from Github service. The logo of Github is an Octocat(at the picture), and the phrase might be the analogue to "Have a good day" or "have a productive day!" P.S: the picture does not belong to me.
Source: https://hinative.com/zh-CN/questions/1199182
也就是说Octotastic寓意着Github的章鱼猫logo(ps 我一直以为是可爱的猫，没想到是半个章鱼...)
github章鱼猫的来历可参考：
https://www.zhihu.com/question/20349012
以及这里还有一堆章鱼....
https://octodex.github.com/
tastic后缀的含义如下：
It's very common for informal writing to add "-tastic" to words to make them sound more effusive. So it's not that October is especially fantastic, but merely that you didn't happen to encounter an occurrence of "Maytastic" or "Junetastic" when their time rolled around. Having said that, I will admit that some months lend themselves to portmanteauing more readily than others. I doubt, for example, that you'll run into an occurrence of "Februtastic," even though February is a truly outstanding month.
source：https://blog.hejunlin.cn/108.html
source: https://english.stackexchange.com/questions/133748/what-does-octotastic-mean/133868#133868