The only day of the week that was mentioned is Thursday, (in first fifteen of movie) as Canoe spoke of "going to a drive-in theatre Thursday evening". This movie, That Darn Cat! (1965)'s release date of release, December 2nd, 1965, was a Thursday.
The Seal-Point Siamese cats who collectively play the role of DC in this film are all "traditional" Siamese, as opposed to their more streamlined contemporaries. Among fanciers of traditional Siamese, they're affectionately known as "Appleheads".
At the drive-in theatre, ticket-taker Burton was ordered to chase DC away by the drive-in manager. Burton's chase of DC ended when he fell in a Volkswagen with an open top which held two manikins, one dressed as a male and the other one dressed as a female.
"Diabolically Clever!", "Diabolical Cat!" & "Delinquent Cat!" could be three substitute nicknames for D.C. Randall. Patricia Randall, (Patty) specifically said "DC is really "diabolically clever.", to FBI Supervisor Newton, on Friday evening, just before Margaret Miller was successfully rescued. D.C. did cause ruckus almost throughout the movie.
When Patti meets Mr. Kelso for the first time in his FBI office she says that her father named the cat. She says her father called the cat "something much worse" than "darn" but her mother wouldn't let them use that name. The inference is that Patti's father named the cat: "Damn", from the Gordon's novel, "Undercover Cat", that this movie was created from.
Patti, said "Darn Cat" once, when she first met FBI agent, Zeke Kelso & brought Margaret Miller's wristwatch to the FBI building. Second rated criminal, Iggy slowly says the movie title, "that darn cat!" (in approximately six to nine seconds), as he was in progress of being arrested. Bobby Darin musically sang "darn cat" 10 times in the introductory song and sang 'darn' once in the closing song. Bobby Darin sang "darn" 11 times total, in the opening and closing songs and "Darn Cat" was said or sang 12 times total.
Three celebrity names were mentioned once, two by Supervisor Newton. Newton mentioned Mack Sennett and Chester Conklin, the morning after the first evening, when Kelso had 4 agents, Spires, Graham, Kelly and Cahill followed DC. Two days later, (the morning before kidnapped bank-teller, Margaret Miller was rescued) jeweler Hofstedder mentioned private investigator, Eliot Ness's name.
When Ingrid Randall's current boyfriend, date & especially car pool + next-door neighbor Gregory Benson, Roddy McDowall stormed in the Randall's house carrying his shotgun to chase down FBI Agent, Zeke Kelso, at the time, Gregory was wearing a monogrammed bathrobe with 3 capital initials, G J & B, the 3 initials are of his character role name, "Gregory J. Benson". As the movie, concludes Ingrid Marshall has FBI Agent Zeke Kelso as her new date or boyfriend & car pool.
When Iggy first thinks that he and Dan stole $250,000 from the bank. Dan told him the amount is $160,000. Iggy then went to their gagged bankteller, Margaret Miller and ask her. After asking if it is $250,000, she shook her head no. Iggy then asked if it was $200,000 she shook her head no again. Then, when he asked, if it was $160,000, then she nodded her head yes. [Iggy threatened to hit Margaret Miller with a right hook, but Dan stopped him]. The amounts of Iggy first two guesses decreased each 20%, exactly. 80% of $250,000 is $200,000 & 80% of $200,000 is $160,000.
DC's 2 initial name was said 42 times total in the 1965 movie, 37 times by Patti Randall, 3 times by FBI agent, Zeke Kelso, 1 time by Ingrid Randall, while reading newspaper, morning after Zeke Kelso & FBI found the two criminals and apprehended them. The very first (and only time) was by Canoe, while waiting for the evening surf weather. Patricia Randall once told FBI agent, Zeke Kelso that DC stands for Darn Cat, inside the FBI station. Kidnapped bankteller, Margaret Miller put her wristwatch around DC's neck, the previous evening and Patty discovered it, as she was feeding DC & feeling around his neck, to slowly stroke or scratch DC's neck.