How can historians know the dates of things so specifically?

Question

Example: Historians can know when the Jewish Temple was destroyed, when certain Pharaohs reigned, when the Gallic wars occurred, etc.

In: Other

Answer 1

Ancient civilizations tended to use astronomy-based calendar systems, and *particularly* lunar calendar systems, all of which are extremely accurate methods of timekeeping because of how stable the Moon’s motion is. Thus, it’s surprisingly easy to correlate given events to the modern Western BC/AD calendar system because it’s relatively straightforward to tie that system back to older lunar calendars.