a world building hc that i always come back 2 for warriors is that the clans like to split up time frames into “eras” like how we do in the human world, and its usually defined by a leader name or something
pre-clans; usually called the pre-clan era, or the settler times. its called that when talking about the time before the clans were formed and back before warrior names were made.
first clans; usually called the star era. the name signifies when the founding leaders took the -star after their name and also is noted to be when the clans first were formed.
the time before the warrior code was made is called pre-code and the time after is called after code; the warrior code changed everything in the clans and speaking of before and after is something to note.
five clans era; this is talking about when skyclan lived in the forest, and was only really used by the cats who could remember skycan. after skyclan left, this era was forgotten, but it used to mean the time of peace in the five clan era.
omen era; the time when bluestar, tallstar, and crookedstar were born until their deaths - goosefeather coined this term. it started with mapleshade’s birth, ends at bluestar’s death - this is the time where omens began and when the dark forest started to manifested and is noted by starclan to be the start of the bad omen era due to so many future leaders having such horrible lives.
firestar’s era; this is obviously when firestar became leader, until his death - firestar really did change the forest and, in his respect, it’s basically worth noting that he literally created an era.
lake era; obviously when the clans came to the lake.
time of peace era; this is the term that many cats in the current wc timeline are trying to coin after the dark fforest has been defeated - obviously, this term isnt really holding up atm, but its worth noting that many cats are trying to make an era of peace here.