Series (United States currency)
On banknotes of the United States dollar, the series refers to the year appearing on the front of a bill, indicating when the bill's design was adopted. The printed series year does not indicate the year a bill was printed; instead it indicates the earliest year that bills of the same design were first made. For example, Series of 1882 gold certificates were being printed as late as 1927. Before 1928. The first U.S. banknotes with a series year were the United States Notes of 1869. Before that, paper currency was identified only by the  act authorizing it, for example, the act of March 3rd, 1863. For these bills, the serial number uniquely identified the bill, except for some issues that exceeded one million bills. In that case, the sequence of serial numbers was restarted, and an extra overprint of 'Series 1' was added to the bill. When one million bills in 'Series 1' were printed, 'Series 2' was used, and so on. 'Series 187' is the highest series number of this sort that was used, on the United States Notes of 1863, in the $5 denomination. Other notes were identified by a date  of issue. Interest-bearing notes were carefully identified as to the date of issue, because they reached maturity a fixed amount of time later. Gold Certificates, issued upon the government receiving a deposit of gold, were dated by hand, and also the depositor was identified. Only the depositor could redeem an early gold certificate. Starting with the Series of 1882, Gold Certificates were made payable to the bearer. National Bank Notes were given a date as well. However, this was not when the bill was first circulated, but rather when the bill was sent from the federal government to the  issuing bank, which could then release it at its own convenience. National currency, issued and unissued, has a series date (corresponding to when the design was last changed) and a release date. The first series printed by the Federal Reserve was Series 1914. It contained a $5 bill with Abraham Lincoln, a $10 bill with Andrew Jackson, and a $20 bill with Grover Cleveland, all of which were large-sized notes. The next series was Series 1918, which had large-sized notes in denominations from $50 to $10,000. The portraits were the same as the  ones mentioned in United States dollar with one exception; the $1000 bill had Alexander Hamilton. Since 1928. Series 1928 was the first series of modern, small-sized notes issued. Since then, the series year has been changed when there is a major design change to a bill; a minor design change is indicated by a letter suffix being added to the series year. Major design changes were rare until 1974, when William E. Simon became Secretary of the Treasury. Before 1974, a change to either the signature of the Secretary of the Treasury or the Treasurer was considered a  minor change; after 1974, a new Secretary of the Treasury was considered a major change. (The only exception to this was in 1979, G. William Miller's signature appeared on Series 1977A instead of Series 1979.) A change in Treasurer is still considered a minor change. The 2017A series apparently was due to a minor change in production, possibly of the ink used. Changes in design, such as the recent changes to the $20 bill to deter counterfeiting, are still considered major changes. Tate-Mellon: 1928 $1 Silver Certificate, 1928 $2 United States Note, 1928 $5 , $10, and $20 Federal Reserve Notes. Woods-Mellon: 1928 $10 Gold Certificate, 1928A $1 Silver Certificate, 1928A $2 United States Note, 1928 $5 United States Note, 1928A $5, $10, and $20 Federal Reserve Notes, 1928B $5, $10, and $20 Federal Reserve Notes, 1928 $50 and $100 Federal Reserve Notes, 1928A $50 and $100 Federal Reserve Notes. Woods-Mills: 1928B $1 Silver Certificate, 1928B $2 United States Note, 1928A $5 United States Note, 1928C $5, $10, and $20 Federal  Reserve Notes. Woods-Woodin: 1928C $1 Silver Certificate, 1928 $1 United States Note, 1928D $5 Federal Reserve Note. Julian-Woodin: 1928D $1 Silver Certificate, 1933 $10 Silver Certificate. Julian-Morgenthau: 1928E $1 Silver Certificate, 1934 $1 Silver Certificate, 1935 $1 Silver Certificate, 1935A $1 Silver Certificate, 1934 $5 Silver Certificate, 1934A $5 Silver Certificate, 1933A $10 Silver Certificate, 1934 $10 Silver Certificate, 1934A $10 Silver Certificate, 1928C $2 United States Note, 1928D $2 United States Note, 1928B $5 United States Note, 1928C $ 5 United States Note, 1934 $5, $10, $20, $50, and $100 Federal Reserve Notes, 1934A $5, $10, $20, $50, and $100 Federal Reserve Notes. Julian-Vinson: 1935B $1 Silver Certificate, 1934B $5 Silver Certificate, 1934B $10 Silver Certificate, 1928E $2 United States Note, 1928D $5 United States Note, 1934B $5, $10, $20, $50, and $100 Federal Reserve Notes. Julian-Snyder: 1935C $1 Silver Certificate, 1934C $5 Silver Certificate, 1934C $10 Silver Certificate, 1928F $2 United States  Note, 1928E $5 United States Note, 1934C $5, $10, $20, $50, and $100 Federal Reserve Notes. Clark-Snyder: 1935D $1 Silver Certificate, 1934D $5 Silver Certificate, 1934D $10 Silver Certificate, 1928G $2 United States Note, 1928F $5 United States Note, 1934D $5, $10, $20, $50, and $100 Federal Reserve Notes, 1950 $5, $10, $20, $50, and $100 Federal Reserve Notes. Priest-Humphrey: 1935E $1 Silver Certificate, 1953 $5 Silver Certificate, 1953 $10 Silver Certificate, 1953  $2 United States Note, 1953 $5 United States Note, 1950A $5, $10, $20, $50, and $100 Federal Reserve Notes. Priest-Anderson: 1935F $1 Silver Certificate, 1957 $1 Silver Certificate, 1953A $5 Silver Certificate, 1953A $10 Silver Certificate, 1953A $2 United States Note, 1953A $5 United States Note, 1950B $5, $10, $20, $50, and $100 Federal Reserve Notes. Smith-Dillon: 1935G $1 Silver Certificate, 1957A $1 Silver Certificate, 1953B $5 Silver Certificate, 1953B $10 Silver Certificate, 1953B $ 2 United States Note, 1953B $5 United States Note, 1950C $5, $10, $20, $50, and $100 Federal Reserve Notes. Granahan-Dillon: 1935H $1 Silver Certificate, 1957B $1 Silver Certificate, 1953C $5 Silver Certificate, 1953C $2 United States Note, 1953C $5 United States Note, 1963 $2 United States Note, 1963 $5 United States Note, 1950D $5, $10, $20, $50, and $100 Federal Reserve Notes, 1963 $1, $5, $10, and $20 Federal Reserve Notes. Granahan-Fowler: 1963A $2 United  States Note, 1966 $100 United States Note, 1950E $5, $10, $20, $50, and $100 Federal Reserve Notes, 1963A $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Granahan-Barr: 1963B $1 Federal Reserve Note. Elston-Kennedy: 1966A $100 United States Note, 1969 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Kabis*-Kennedy: 1969A $1 Federal Reserve Note. Kabis-Connally: 1969B $1 Federal Reserve Note, 1969A $5, $10, $20, $50, and $100  Federal Reserve Notes. Bañuelos-Connally: 1969C $1 Federal Reserve Note, 1969B $5, $10, $20, $50, and $100 Federal Reserve Notes. Bañuelos-Shultz: 1969D $1 Federal Reserve Note, 1969C $5, $10, $20, $50, and $100 Federal Reserve Notes. Neff-Simon: 1974 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes, 1976 $2 Federal Reserve Note. Morton-Blumenthal: 1977 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Morton-Miller: 1977A $1, $5 , and $10 Federal Reserve Notes. Buchanan-Regan: 1981 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Ortega-Regan: 1981A $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Ortega-Baker: 1985 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Ortega-Brady: 1988 $1, $5, $50, and $100 Federal Reserve Notes. Villalpando-Brady: 1988A $1, $5, $10, and $20 Federal Reserve Notes, 1990 $10, $20, $50 , and $100 Federal Reserve Notes. Withrow-Bentsen: 1993 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Withrow-Rubin: 1995 $1, $2, $5, $10, and $20 Federal Reserve Notes, 1996 $20, $50, and $100 Federal Reserve Notes. Withrow-Summers: 1999 $1, $5, $10, $20, and $100 Federal Reserve Notes. Marin-O'Neill: 2001 $1, $5, $10, $20, $50, and $100 Federal Reserve Notes. Marin-Snow: 2003 $1, $2, $5, $10 , and $100 Federal Reserve Notes, 2004 $20 and $50 Federal Reserve Notes. Cabral-Snow: 2003A $1, $2, $5, and $100 Federal Reserve Notes, 2004A $10, $20, and $50 Federal Reserve Notes. Cabral-Paulson: 2006 $1, $5, $5**, $10, $20, $50, and $100 Federal Reserve Notes, 2006A $100 Federal Reserve Note***. Rios-Geithner: 2009 $1, $2, $5, $10, $20, $50, and $100*** Federal Reserve Notes, 2009A $100*** Federal Reserve Note. Rios-Lew: 2013 $1 , $2, $5, $10, $20, $50, $100 Federal Reserve Notes. Carranza-Mnuchin: 2017 $1, $10, $20, $50, $100 Federal Reserve Notes, 2017A $1, $2, $5, $10, $50 and $100 Federal Reserve Notes. <nowiki>*</nowiki>When Dorothy Kabis became Treasurer, she was named as Dorothy Andrews Elston. Later during her term, she married and changed her signature accordingly, but the signature combination only lasted five months before David M. Kennedy would resign. <nowiki>**</nowiki>The first printing of 2006 $5 notes (approximately  409 million notes) used the 1996-generation designs. After rumors surfaced that people were bleaching $5 bills to make them resemble $100 bills, the note's design was changed as an afterthought and over 2.1 billion bills were produced with the new 2004-generation designs. <nowiki>***</nowiki>Originally series 2009 $100 notes were scheduled to be released in February 2011, but were delayed due to printing problems. However, due to intense demand for $100 bills from banks, Series 2006A (with the same Cabral-Paulson signatures as series 2006 notes) was printed, using the 1996-era  design instead of the new 2004-era design. The new $100 note was finally released in October 2013 as series 2009A, not series 2009 as the defective notes were dated. The 2009 series was sorted, and notes found acceptable were eventually released. Both of these notes bear the same Rios-Geithner signatures.