Hello Carole, Until 1752 the Julian Calandar was used, the year ran from 28 March to the 27 Mar of what we would think of as the following year. In this country (England) the Financial Year still starts on 28 March. So in your first example (Jan to June 1) you are quoting dates from two years. In your second example (Jul to Dec 1) you are quoting dates in the same year. This may be the reason for the error in the first example. Leycester would have been using the Julian Calandar. Regards, Nick When you do >not know a day and month and you use Jan to June 1 (I've been checking >against Leycester) your year will be 1 to high (1390). If you use Jul >to Dec 1, your dates will match Leycester's dates 1389). Why this is >so, I do not know! > > >Carole > Nicolas Blackhurst, in Chester (The Roman Fortress of Deva), England nicolas.blackhurst@virgin.net Web Site: http://freespace.virgin.net/nicolas.blackhurst/homepage.htm