Because, as Humbert Humbert says in his poem (http://docs.google.com/Doc?id=dcm8s5q2_157v2ffq) she is 5003, which is the same as 13 years 8 months 11 days 8 hours 33 minutes 33 seconds 177 milliseconds and 600 microseconds, so by today she would be 5003 days old which is based on august 25th, 1994 (though she was not born in 94, it doesn't matter!)
I believe Dolores Haze's birthday is August 25th.
Because, as Humbert Humbert says in his poem (http://docs.google.com/Doc?id=dcm8s5q2_157v2ffq) she is 5003, which is the same as 13 years 8 months 11 days 8 hours 33 minutes 33 seconds 177 milliseconds and 600 microseconds, so by today she would be 5003 days old which is based on august 25th, 1994 (though she was not born in 94, it doesn't matter!)