In general all of the tribes are identified by the use of a seal date. The date is a theoretical date derived from the passage in Revelation 7 where the tribes of Israel are sealed.
Each tribe as a seal date 12,000 days apart -- in the order listed in that passage.
The tribe of Dan is not listed there but is the location from which all of the other tribes are measured. Dan sits on Day 1 of the days.
| Day | Tribe | Date | Document | Modern Nation |
|---|---|---|---|---|
| 1 | Dan | 6 Oct 1579 OS | Union of Utrecht | Netherlands |
The Union of Utrecht was signed by Holland, Zeeland and Utrecht on January 23, 1579.
The document unified most of the northern territories of what would become the Protestant Dutch Republic. The Catholic territories in the southern part of the country would eventually become part of France.
The Union of Utrecht was not recognized internationally until the Peace of Westphalia was signed in 1648 ending the Eighty Years war.
The Union of Utrecht had several additional provinces sign on across 1579 and 1580. This spread in signatories across time would be seen again on seal date related documents especially with the United States Declaration of Independence in 1776.
Until the signing of this document the Low Countries, what today is the Netherlands, had been under the control of Spain.
The situation in the Dutch Republic was complicated, with lots of internal disagreements between the constituant parts. The following map helps explain the diversity of the country at the time of this agreement.
This sealing date is fuzzy, spread out over more than 1 year.
Many of the other key dates like this one turn out to have key political events happen on almost exactly the correct date. I have been unable to locate any text that would narrow down this signing date.