They are traditions that are no longer accepted again into our culture.
The adjective form for "custom" is custom or customary.
I think the closest verb for custom would be customize.
Tailored.
Hawthorne cites political changes as the reason for losing his job in the custom house. He was a Democrat and when the Whigs came into power, they replaced him with one of their own appointees.
The custom of following already decided cases is called "stare decisis," which means to stand by things decided. It is a principle in common law legal systems where judges are required to follow precedents set by higher courts when making decisions in similar cases.
shibboleth
not all old things are outmoded
Riding in a carriage is outmoded since the invention of cars.
outdated, antiquated
It is an outmoded phrase meaning an eyewitness.
he first designs of hoes and brush harrows were outmoded in the 1840s by the Geddes, a hinged triangular construction of wood with teeth made of iron, which, in turn, was outmoded several decades
During this time, the British Navy was decreasing in size and deteriorating. It also had old and outmoded ships.
Superannuated has the synonyms outdated, outmoded, old-fashioned, or antiquated.
The word could be obsolete, outmoded, or superseded.
The adjective could be obsolete, outmoded, or superseded.
Obsolete, passé, or outdated.
old, outdatd, out of date, obsolete, unfasionable, outmoded, passe, old-hat