Determination of the day of the week the day of the week without any calculations. Examples: December is in row F and 26 is in column E, so the letter for the date is C located in row F and column E. 93 (year mod 100) is in row D (year row) and the letter C in the year row is located in column G. 18 ([year/100] in the Gregorian century column) is in row C (century row) and the letter in the century row and column G is B, so the day of the week is Tuesday. October 13 is a F day. The letter F
World Day for Laboratory Animals and other groups opposed to animal research have claimed that World Day For Animals In Laboratories is recognised by the United Nations. However, the day is not included on the official list of United Nations observances. World Day for Laboratory Animals World Day For Animals In Laboratories (WDAIL) (also known as World Lab Animal Day) is observed every year on 24 April. The surrounding week has come to be known as "World Week for Animals In Laboratories". The National Anti-Vivisection Society (NAVS) describe the day as an "international day of commemoration" for animals in laboratories. World Day For Animals In