The complaint is that there is almost no practical difference between enums and just doing a #define Monday 30, they aren't scoped/namespaced to the enum itself. Like if you wrote struct { int a; int b; }; and now anything.b always works. (Which is how ancient pre-standard C actually worked which is why you have fields in UNIX structures prefixed to make them unique, st_ for struct stat, tv_ for struct timeval, etc.)

CC: @meeper@udongein.xyz