historic

A history, a non-fiction account of the past.

A historian.

Very important; noteworthy: having importance or significance in history.

“A historic opportunity”

Old-fashioned, untouched by modernity.

(grammar) Various grammatical tenses and moods specially used in retelling past events.

“The historic tenses include the imperfect, the pluperfect, and the future perfect.”

Of, concerning, or in accordance with recorded history, (particularly) as opposed to legends, myths, and fictions.

“July 4, 1776, is a historic date. A great deal of historical research has been done on the events leading up to that day.”

Of, concerning, or in accordance with the past generally.

Of, concerning, or in accordance with the scholarly discipline of history.

“The Royal Historical Society”

Forming compound adjectives with the meaning "historical/~" or "historically":

“historical-political”