RoG points out that the circulating recording of s1 attributed to this date is the same as 1/17/74, which is its correct date. Billing (Keystone calendar and HDR): "Jerry Garcia and Merl Saunders". Old note said "E.W. Wainwright on drums," but that seems incorrect.
listings: San Francisco Sunday Examiner and Chronicle Datebook, March 3, 1974, p. 4 |San Francisco Examiner, March 8, 1974, p. 27 |Hayward Daily Review, March 8, 1974, p. 43 |San Francisco Examiner, March 9, 1974, p. 8