Man pages matching name allegro_date_str in section 3alleg4:

ALLEGRO_DATE_STR.3alleg4.en	debian 10 / allegro4-doc
ALLEGRO_DATE_STR.3alleg4.en	debian 11 / allegro4-doc
ALLEGRO_DATE_STR.3alleg4.en	debian 12 / allegro4-doc