The actual command you need to use is something like “git show HEAD@{2013-02-25}:./file”, which I would count as arcane. And pushing your repo to github and looking at the commit history is using a graphical interface.
For a single-person, single-branch workflow, git is extremely easy. It gets really complicated when doing something more, until you stop seeing git as a VCS tool, but rather as a tool to manipulate the data structure used to do the VCS. But that's a completely different, unrelated topic to this thread.