Information from Helen Jones has John's baptism as Jan 26, the Parish Church of Scalby register lists it as Jan. 25th.
IGI Individual Record FamilySearch™ International Genealogical Index v5.0 British Isles 
JOHN SEDMAN Christening:  26 JAN 1783  Scalby Near Scarborough, Yorkshire, England Parents:   Father: JOHN SEDMAN Mother: ELIZABETH  
Source Information: Batch No.:  C106412 Dates: 1730 - 1812 Source Call No.: 0919204 Type:  Film Printout Call No.: 6910826 

1841 England Census Record info about John Sedman
Name: John Sedman Age: 55 (ages were rounded up or down by 5 years in the 1841 census) Estimated birth year: abt 1786 Gender: Male Where born: Yorkshire, England Civil parish: Scalby Hundred: Pickering Lythe County/Island: Yorkshire Country: England Source information: HO107/1261/7 Registration district: Scarborough Sub-registration district: Scarborough ED, institution, or vessel: 1 Folio: 5 Page: 2 Line number: 3 GSU Number: 464235 
John Sedman abt 1786 Yorkshire, England Scalby Yorkshire  
John Sedman abt 1836 Yorkshire, England Scalby Yorkshire 
Sarah Sedman abt 1801 Yorkshire, England Scalby Yorkshire 
Willis Sedman abt 1832 Yorkshire, England Scalby Yorkshire

1851 England Census Record info about John Sedman
Name: John Sedman Age: 68 Estimated birth year: abt 1783 Relation: Head Gender: Male Where born: Burniston, Yorkshire, England Civil parish: Burniston County/Island: Yorkshire Country: England 
Source information: HO107/2368 Registration district: Scarborough Sub-registration district: Filey ED, institution, or vessel: 6 Folio: 574 Page: 4 Household schedule number: 22 GSU Number: 87646-87649 
John Sedman  abt 1783 Burniston, Yorkshire, England Head Burniston Yorkshire  
John Sedman abt 1836 Burniston, Yorkshire, England Son Burniston Yorkshire 
Sarah Sedman abt 1795 Falsegrave, Yorkshire, England Wife Burniston Yorkshire

England & Wales, FreeBMD Death Index: 1837-1983 Record about John Sedman
Name: John Sedman Year of Registration: 1852 Quarter of Registration: Jul-Aug-Sep District: Scarborough County: East Riding Of Yorkshire, North Riding Of Yorkshire Volume: 9d Page: 236