By a date means before but including that date. If you do not want to include that date, then use before instead. So "By Feb.
A date is a specific time that can be named, for example a particular day or a particular year. [...] See full entry.
He was tortured for 10 days, enough time for his hair to turn white. This misconception probably arose because in the anime(for those who only watched the anime) it turned white in a few seconds.
He left because J.K. Rowling wanted to RUIN every character that she didn't KILL!!! He left because he's an emotion git, who couldn't handle the battle against you know who... VOLDEMORT!
She's been asleep for at least 2k yrs old. It would be funny if she fell asleep during the time period ESO is playing in. Would be even more awesome if the player character in ESO helped with that. She looks like in her early 20s.