The date of establishment or date of founding of an institution is the date on which that institution chooses to claim as its starting point. Institutions are structures and mechanisms of Social order and Cooperation governing the Behavior of a Set of Individuals A date in a calendar is a reference to a particular day represented within a Calendar system Often the criteria that define a date of establishment or founding are ill-defined—or more specifically, are ill-defined in general, although each institution tends to adopt a rather rigid definition of its own date of establishment. A definition is a statement of the meaning of a Word or Phrase.
Yet still more definitions of establishment are possible in the case of each nation state's history and culture. Events 836 - Pactum Sicardi, peace between the Principality of Benevento and the Duchy of Naples Year 1776 ( MDCCLXXVI) was a Leap year starting on Monday (link will display the full calendar of the Gregorian calendar (or a The United States of America —commonly referred to as the A constitution is a system for government often Codified as a written document that establishes the rules and principles of an autonomous political entity A Treaty is an agreement under International law entered into by actors in international law namely States and International organizations. A revolution (from the Latin revolutio, "a turnaround" is a fundamental change in power or organizational structures that takes place in a relatively War is an international relations Dispute, characterized by organized Violence between National Military units
Likewise, a university may define its date of establishment by:
Yet still more variations on the definition of the date on which a university was established are possible as considered reasonable by each university's governing body or executive officers.
Ultimately an established date of an institution either is decided upon as an internal matter by that institution or is decided for that institution by a normative higher authority outside that institution. For all institutions falling into a particular type of similar institutions, if the date of establishment is not decided by the same authority using the same criteria variations in the definition of the date of establishment can arise. In Metaphysics, a type is a Category of being. A Human is a type of thing a cloud is a type of thing ( Entity) and so on