Ancient Date Converter

Name: Ancient Date Converter
Rating: 5 (1 reviews)
Author: Karen Grigorian (he/him)

Convert ancient dates into Historical Calendar dates (aka Holocene Calendar or Human Era) or any other year numbering system.

As of June 2026, Ancient Date Converter has 85 users and a 5.00/5 rating from 1 reviews in the Accessibility category.

Karen Grigorian (he/him)Accessibility★ Featured

Chrome Web Store ↗.crx

Users−7.6%

Rating0%

5.00

1 reviews

Reviews0%

Version

9.1.1

Manifest V3

90-day change · In the last 90 days this extension 3 version updates.

History

8 snapshots

Tracking since Apr 19, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 19, 2026	92	5.00	1	9.0.2
May 4, 2026	90	5.00	1	9.0.2
May 13, 2026	91	5.00	1	9.0.2
May 25, 2026	85	5.00	1	9.0.2
May 30, 2026	85	5.00	1	9.0.3
Jun 4, 2026	88	5.00	1	9.1.0
Jun 8, 2026	84	5.00	1	9.1.0
Jun 15, 2026	81	5.00	1	9.1.0
Now	85	5.00	1	9.1.1

Changelog

May 30, 2026

description

This extension converts ancient dates into Historical Calendar dates on Wikipedia and other websites. The first year of the Historical Calendar is 10,000 BC. Year 2025 AD is year 1,2025 in Historical Calendar, but in most cases you can omit the first digit. 

This means you can use Historical Calendar only when dealing with ancient history. Your day-to-day life is not affected, thus no official calendar reform is needed for Historical Calendar to be practical. 

Alternatively, you can use any other timeline by picking the starting point yourself. 

The extension can potentially detect and convert all BC dates, even those that lack “BC” label. If some date is not being detected you can fix that using tools provided by the extension.

It can also detect and convert dates of the Common era, but only those that have “AD” or “CE” label next to them.

This extension converts ancient dates into Historical Calendar dates on Wikipedia and other websites. The first year of the Historical Calendar is 10,000 BC. Year 2026 AD is year 1,2026 in Historical Calendar, but in most cases you can omit the first digit. 

This means you can use Historical Calendar only when dealing with ancient history. Your day-to-day life is not affected, thus no official calendar reform is needed for Historical Calendar to be practical. 

Alternatively, you can use any other timeline by picking the starting point yourself. 

The extension can potentially detect and convert all BC dates, even those that lack “BC” label. If some date is not being detected you can fix that using tools provided by the extension.

It can also detect and convert dates of the Common era, but only those that have “AD” or “CE” label next to them.

Permissions & access

Permissions: storageactiveTab
Host access: <all_urls>

Screenshots

About

This extension converts ancient dates into Historical Calendar dates on Wikipedia and other websites. The first year of the Historical Calendar is 10,000 BC. Year 2026 AD is year 1,2026 in Historical Calendar, but in most cases you can omit the first digit. 

This means you can use Historical Calendar only when dealing with ancient history. Your day-to-day life is not affected, thus no official calendar reform is needed for Historical Calendar to be practical. 

Alternatively, you can use any other timeline by picking the starting point yourself. 

The extension can potentially detect and convert all BC dates, even those that lack “BC” label. If some date is not being detected you can fix that using tools provided by the extension.

It can also detect and convert dates of the Common era, but only those that have “AD” or “CE” label next to them.