Helping Rosemarie with her family tree reminded me of this web site

www.hf.rim.or.jp/~kaji/cal/index.html

This gives the day of the week when the birth/marriage/burial took place

This is really useful as it not only helps to know the day of the week someone was born or when an event occurred but also in letters and documents where there is a problem in determining the year there's the means to check it against the calendars. Please keep this on the site as I can imagine it will be useful to many of us. Thanks.