When it comes to pronunciation, ‘yore’ and ‘your’ are pronounced the same way. But there the similarity ends. While ‘your’ is used in almost all contexts, ‘yore’ is considered to be rather old fashioned and literary, and is therefore restricted in its use. It is mostly used in certain fixed expressions like ‘of yore’. It means ‘long ago’.
*The old women spent their time talking about the days of yore. * This huge building was used as a stable in days of yore.
Source: “The Hindu” – Know Your English Column – Jan 22, 2008