Founded Date Field
Founded (Organizations)
The date should be entered in reverse format, YYYY-MM-DD so that it can be easily sorted. You may only know the year or part of the date, put in what you know and if you need to make a comment, put it in the Administrative note.
Examples:
1860-09-06
1933
1894-03
To figure out when an organization was founded (especially for anniversaries), search newspapers, encyclopedia articles, and online books for it. If the organization is still functioning today, its website is another good source of information about its founding.