ruby-1.9.2-p290 :003 > login_time="Dec  7 08:57:16"
 => "Dec  7 08:57:16"


ruby-1.9.2-p290 :008 > @date = Time.parse(login_time)
 => 2011-12-07 08:57:16 -0600

ruby-1.9.2-p290 :009 > @date.to_i
 => 1323269836