Good to know, Lee. Thanks. (I'm still relying on QuattroPro, which has a date function working back to about 1600.) Rick Van Dusen On 9/26/2015 9:36 AM, Lee Hoffman/KY wrote: > At 9/26/2015 11:28, you wrote: : : : > There are Extended Date Function add-ins for Excel that will provide for > dates before 1 Jan 1900. These are almost as simple to use as regular > date functions for most purposes. > > Lee