So, this was birth date you were questioning a few days ago? Interesting that the dob is written, “4-8-1961” and the date accepted into the Indonesian school is written, “1-1-68 (January 1, 1968).” If the acceptance date is mdy, then the dob would be April 8, 1961.
I think that date on the Indonesian school document may have been taken down from the US way of writing the date. They would not think to change it to their own method.