Thank you so much everyone for the answer to this problem and for the links to the calendar sites. I wish that all my genealogy problems were answered so easily. Funny enough the clue to the age of the photo was staring me in the face but I didn't see it until a few minutes ago. Thank you again for the prompt replies. Vivienne -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian & Fay Lea Sent: 28 May 2010 16:46 To: [email protected] Subject: Re: [ZA-EC] what years would 30th June have been a saturday? According to: http://www.searchforancestors.com/utility/perpetualcalendar.html 1917, 1923, Etc, Have a look! You can find anything on Google.... Cheers Fay -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of E & V Waugh Sent: 28 May 2010 05:14 PM To: [email protected] Cc: [email protected] Subject: [ZA-EC] what years would 30th June have been a saturday? Hello Mathematicians! Here is a problem to solve: What years for the period 1910 - 1950 would 30th June have been a Saturday? I have a photo I wish to date with this written on the back : "taken Saturday afternoon 30th June". I believe that there is an algorithm for working out the answer but this is beyond me. It is not evident how to google this. Thanks a lot Vivienne ------------------------------- To unsubscribe from the list, please send an email to [email protected] with the word 'unsubscribe' without the quotes in the subject and the body of the message No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.437 / Virus Database: 271.1.1/2899 - Release Date: 05/28/10 06:25:00 ------------------------------- To unsubscribe from the list, please send an email to [email protected] with the word 'unsubscribe' without the quotes in the subject and the body of the message Internal Virus Database is out of date. Checked by AVG - www.avg.com Version: 9.0.716 / Virus Database: 270.14.151/2587 - Release Date: 01/19/10 01:00:00