He might show up at /b/ later. We had a thread awhile at /b/ tracking clues of his posts and this came up.
1st post was at 08/21/15 (he made an unintentional error of making it a 2005 or might be intentional for us to remember the date)
2nd post was at 09/22/15 (again unintentionally he made a mistake on the date making it to 08/22/15 but then he made a some lines to erased it, might be another hint for us to believe that the date is really important)
last clue is he said he will be back in a month, he didn't say exactly a month and kept it vague and ambiguous.
1st photo - 8/21/15
2nd photo - 9/22/15
which made sense of the theory that he will show himself this day to complete the sequence.
1st - 8/21/15
2nd - 9/22/15
3rd - 10/23/15? let's wait till later if he really shows up.