Another "Day of the week calculator". The penguin is clever. He knows the day of the week of evey single calendar date since 1583. In year before the Gregorian calendar was introduced. I don't know if it works for dates before 1583 too. For the PERIODS use the SPACE key. Press ARROW keys to delete your input. CREDITS: JH1010 for his awesome "Day of the week calculator". I made the graphic with Inkscape. Thanks to tutor4u on Youtube for his Inkscape Tutorial - Penguin
