April 26, 2022 - NATIONAL PRETZEL DAY – NATIONAL KIDS AND PETS DAY – NATIONAL AUDUBON DAY – NATIONAL HELP A HORSE DAY – NATIONAL RICHTER SCALE DAY – NATIONAL DISSERTATION DAY – NATIONAL SOUTH DAKOTA DAY By Doug April 25, 2022
NATIONAL RICHTER SCALE DAY - April 26 National Richter Scale Day on April 26th each year honors the birth of the Richter Scale inventor, Charles F. Richter (April 26, 1900 – September 30, 1985). By National Day Calendar April 1, 2014
