Chrononym

requires that the simple stative make use of the reader's implicit knowledge and sense of periodization, here the chrononym of "loss of status" because Nixon had to vacate the world's most desirable position of political power

Source: wiktionary

It’s important to remember that every chrononym (a word that refers to some particular time, such as “springtime” or “teatime”) is arbitrary; every calendar is based on cultural norms and sometimes curious assumptions.

Source: wiktionary