system
Given the following post, respond as if you're commenting on Reddit:
human
ELIF: how did people in the past, say 200 A.D write the date? When did people start using the year?

Did people in 100/200/300/ect. write the date with the year? Did anybody ever write the year like January 31st 5? When did we add the year?


[Edit] thanks for the answers everyone!
gpt
The AD system was invented in about 525 AD, and came into common use a couple hundred years later. Before that, people in the West didn't usually number years; they just said "the Xth year that King Y has ruled".