Years Before Present Calendar

The Years Before Present Calendar (YBP) is a meta-calendar and is not used by any in-world culture of Torjeo, rather it is used by its creator to easily compare historical events with the various in-world calendars used by the in-world cultures. Quite unlike any conventional calendar it is not based on a time in history from which it counts up, rather it is based in the most recent year that I will worldbuild up to (hence "years before present") and years are counted by how far in the past it occured before the present day. So for example the most recent year is 0YBP and 100 years before that is 100YBP.

When prefixed with <!> the date is understood to mean "approximately around this date". so !5100YB means "around 5100 years before present". This holds true for all calendars.

Here is a table which shows how YBP compares with in-world calendars.