The 23rd June 1912 is the 175th day of the year, and 175 in binary is 10101111, which are the first 8 digits of the tape. Of the other 17 digits 11110010110011000 I cannot make much sense. In decimal it's 124312. Maybe it's the year 1912 with an offset of 122400 = 34*60*60, but that seems rather arbitrary to me.