You are probably familiar with the change from the Julian to the Gregorian      
calendar in 1752/53. Because of the Quaker custom of not using standard         
names for months there is some modern confusion when referring to pre-1752       
Quaker records. The following table should be of assistance.                    
                                                                                
    OLD STYLE                              NEW STYLE                            
    (Before 1753 the         QUAKER        (After Jan 1, 1753)                  
    year began                                                                  
    in March)                                                                   
                                                                                
March (before 1753)        1st Month            January (after 1753)            
April                      2nd Month            February                        
May                        3rd Month            March                           
June                       4th Month            April                           
July                       5th Month            May                             
August                     6th Month            June                            
September                  7th Month            July                            
October                    8th Month            August                          
November                   9th Month            September                       
December                  10th Month            October                         
January                   11th Month            November                        
February                  12th Month            December                        
                                                                                
> From: btysingr@med.unc.edu (Barbara R. Tysinger)