Here is an excellent and clear article by Laurence Harris, Head of Genealogy UK at MyHeritage: http://blog.myheritage.com/2015/01/understanding-dates-five-common-mistakes-to-avoid/.
Here is an excellent and clear article by Laurence Harris, Head of Genealogy UK at MyHeritage: http://blog.myheritage.com/2015/01/understanding-dates-five-common-mistakes-to-avoid/.