In addition to his large number of published articles and books, Leonhard Euler engaged in a prolific correspondence with scientists, mathematicians, and administrators throughout his career. By compiling the dates of all of his known letters, as described in the Opera Omnia, we can get some understanding of Euler’s weekly schedule. We report here for the first time Euler’s preference, particularly during his Berlin Period, of writing letters on Tuesdays and Saturdays.
"Leonhard Euler’s Correspondence Schedule,"
Euleriana: 2(1), pp.51-55.
Available at: https://scholarlycommons.pacific.edu/euleriana/vol2/iss1/7