There's a good roundup here: 600 B.C.E.

I'll throw in a few others which I hope are not duplicative.

"The Iron Age is taken to end, also by convention, with the beginning of the historiographical record. This usually does not represent a clear break in the archaeological record; for the Ancient Near East, the establishment of the Achaemenid Empire c. 550 BC (considered historical by virtue of the record by Herodotus) is usually taken as a cut-off date" (source)

"Greek drama is thought to have developed during the 6th century BC from imitative religious magic worship of Dionysus" (source)

"The first manufactured coins seem to have appeared separately in India, China, and the cities around the Aegean Sea between 700 and 500 BCE." (source)

[Nineveh] "... was the largest city in the world for some fifty years until the year 612 BC…" (source)

Did you note the three-fer in the first reference? The idea of writing down history literally started!

It's actually a bit spooky to see it collected, isn't it? But see what you can pick up that's just laying around if you're alert to it?

Thanks for your interest!