Date of Birth - 1901 census.   International Genealogical Index gives day and month for same year as above.  (Eh??) 

Found his baptism in Kilrea CofI church:
25 Sep 1831    Thomas? Gordon    James Gordon    Martha     Lislea        No.84

IFHF confirms a Thomas Gordon baptised to a James Gordon and a Martha Unknown in Kilrea CofI in 1831.

IFHF shows a Thomas Gordon baptised to a James Gordon and Mary Unknown in Kilrea CofI in 1832.

Is this him:
name:    Thos Gordon
gender:    Male
baptism/christening date:    10 Oct 1832
baptism/christening place:    KILREA,LONDONDERRY,IRELAND
father's name:    Jas Gordon
mother's name:    Mary
indexing project (batch) number:    C70034-1
system origin:    Ireland-ODM
source film number:    0908817 IT 2

Or is this him:
name:    Thos Gordon
gender:    Male
baptism/christening date:    25 Sep 1831
baptism/christening place:    KILREA,LONDONDERRY,IRELAND
father's name:    Jas Gordon
mother's name:    Martha
indexing project (batch) number:    C70034-1
system origin:    Ireland-ODM
source film number:    0908817 IT 2

His will, made in 1911, and probated on 25th Nov 1918, gave him as Thomas Gordon, Lislea, farmer, his son, David was the executor and he inherited all the property.