Linux does not store the time the file was created. Windows(updated- some modern linux file systems do, see note at the end) Windows does creation time.
Github seems to be a bit odd, don't right click and save as, otherwise it's an HTML file with extension EXE. And when you try to run it on cmd you get an error on cmd about 64bit and 32bit. Try left clicking it then the next page gives you a download of the actual file. And you need to be in an administrative command prompt, otherwise you get a mesage about do you trust programs from this publisher, and if you say yes then a cmd window flashes up and goes(and whether cmd /k or not). But it works fine from an administrative cmd prompt.
ADDED
Some modern linux file systems store file creation time.
http://unix.stackexchange.com/questions/91197/how-to-find-creation-date-of-file