On Wednesday, July 6, 2016 at 12:37:45 PM UTC+1, Ian Goddard wrote: > On 06/07/16 12:12, WJH wrote: > > I'm really thinking about the transition period (which I accept doesn't concern medievalists) where it's not always clear whether a date is OS or NS and so any comparison with other sources needs to bear in mind that that date may be equivalent to one 11 days earlier OR later. > > Forget 11 days - it can be a year out if you don't know what date was > taken for the start of the year! > True! But my main point remains that this is the sort of check that computers do better than humans. > -- > Hotmail is my spam bin. Real address is ianng > at austonley org uk