Eugen Mittwoch the UCL (University of London) and, in 2014, was still scientifically active and celebrated her 90th birthday in her old institute. Mittwoch died in London, England, UK. Eugen Mittwoch Eugen Mittwoch (December 4, 1876 - November 8, 1942) was the founder of Modern Islamic Studies in Germany, and at the same time an eminent Jewish scholar. Coming from an old Orthodox Jewish family, Mittwoch was born in Schrimm, Prussian Province of Posen, Imperial Germany (now Srem in Poland). He initially wanted to become a Rabbi. During his studies in Berlin he discovered Islamic studies and did his doctorate with Eduard
Determination of the day of the week his collected works in 1927. Gauss' method was applicable to the Gregorian calendar. He numbered the weekdays from 0 to 6 starting with Sunday. He defined the following operation: The weekday of 1 January in year number is where is the remainder after division of by , or modulo . This formula was also converted into graphical and tabular methods for calculating any day of the week by Kraitchik and Schwerdtfeger. Another variation of the above algorithm likewise works with no lookup tables. A slight disadvantage is the unusual month and year counting convention. The formula is where For example,