Release: Federal Reserve Bulletin
Data before 1975 represent the date of the New York Fed discount rate change, data after 1975 represent the date of the first Federal Reserve bank discount rate change.
Source: Board of Governors: Banking and Monetary Statistics, 1914-1941, and 1941-1970; the Annual Statistical Digest, 1970-1979; and the Federal Reserve Bulletin, 1978 - January 8, 2003.
Please refer to http://www.federalreserve.gov/boarddocs/press/monetary/2003/20030106/default.htm for further information on the discontinuation of this series effective January 9, 2003.
Board of Governors of the Federal Reserve System (US), Discount Rate Changes: Historical Dates of Changes and Rates (DISCONTINUED) [DISCOUNT], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/DISCOUNT, April 30, 2017.