Right in console, but not in anser.
I'm not sure, but why am I getting error in results, when console sad I'm right?
From: https://checkio.org/mission/days-diff/solve/
HTTP_USER_AGENT:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.106 Safari/537.36