October 14th is Be Bald and Free Day
For books about hair loss, see 616.546.
October 14th is also Face Your Fears Day.
For books about fear in a psychological sense, see 152.46.
For books about bravery and cowardice in terms of ethical consequences, 179.6.
October 14th is also Ada Lovelace Day.
For biographies of mathematicians, see 510.92.
For algorithms in an accounting context, see 511.8.
For algorithms as applied to computer programs, see 005.1.