Old Era on Wikipedia is a Chrome extension that allows users to convert BC/BCE dates into Old Era dates on Wikipedia and other websites. This extension is designed to put history into perspective by using a year numbering system that counts years of history in ascending order.

The concept of Old Era is not new and is similar to the Holocene Calendar proposed in 1993 by Cesare Emiliani. Old Era covers the first 10,000 years before Christ (from 10,000 BC to 1 BC) and provides a chronological numbering system for these years.

The extension automatically detects and translates most BC dates on Wikipedia, including ranges of dates. For situations where a BC label is missing, a server stores positions of such dates in the surrounding text. The extension also allows users to manually activate it on other websites, although it works by default on Wikipedia.

In the future, the developer plans to propose a universal markup for BC dates on Wikipedia, making it easier for any extension or script to translate the dates into different timelines. This will enable users to fix any date conversion issues themselves.

Overall, Old Era on Wikipedia is a useful tool for anyone interested in understanding and using Old Era dates. By providing a simple and accessible way to convert BC/BCE dates, this extension offers a unique perspective on historical events and timelines.