The average person's fear of April 15th hasn't changed in decades...
...as this page from Charlton's TV Teens #9 (1955) shows!
If the fashions seem a little dated for 1955, that's because this series consisted of reprints of 1940s newspaper strips along with several stories created for Mopsy's first comic book series in the late 1940s.
Creator Gladys Parker wrote and drew all Mopsy material without "ghosts" to help, and when she retired in 1965, the strip ended.
Parker passed away the following year.
Trivia: The filing deadline for individuals was March 1 in 1913 (the first year of a federal income tax), and was changed to March 15 in 1918 (inspiring many jokes about having to "beware the Ides of March"), then to April 15 in 1955.