Legality of Cannabis by U.S. Jurisdiction Pennsylvania portalUnited States portalHistory portal This category is for topics specifically related to the year 1973 in the U.S. state of Pennsylvania. 19681969197019711972197319741975197619771978 1920s1930s1940s1950s1960s1970s1980s1990s2000s2010s2020s Subcategories This category has the following 4 subcategories, out of 4 total. / 1973 disestablishments in Pennsylvania (8 P) 1973 establishments in Pennsylvania (34 P)E 1973 Pennsylvania elections (1 P)S 1973 in sports in Pennsylvania (28 P)