Example image of eyePlorer eyePlorer map for '1831': Common year starting on Saturday Common year starting on Thursday Gregorian calendar Julian calendar Roman numerals Boston January 1 Massachusetts The Liberator William Lloyd Garrison January 14 The Hunchback of Notre Dame Victor Hugo Austria February March Modena Papal States Parma February 2 Pope Pope Gregory XVI Pope Pius VIII Battle of Debre Abbay February 14 Marye of Yejju RAS Sabagadis Tigray (province) Battle of Olszynka Grochowska February 20 Poland Russia French Foreign Legion March 10 Bosnian uprising March 29 Ottoman Empire April 7 Brazil Emperor Pedro I of Brazil Pedro II of Brazil April 18 April 27 Battle of Ostrołęka (1831) Charles Albert of Sardinia Charles Felix of Sardinia May 26 Poles