I can't remember if that's the date or not, but I think this is related to that voice actress who recently died from pneumonia.
If you're referring to Matsuki Miyu, she died on October 27th, so it would be the wrong date. (Also, she never voiced this character.) Neither the Pixiv nor twitter versions of this post have commentaries, and both Nohara Rin's English and Japanese VA's are still alive. Rin herself, though, is dead; maybe the picture is a reference to that.