At the end of the episode there is a tribute to series creator Stephen Hillenburg with the words "Thank you Steve Hillenburg" on the screen, Hillenburg died on November 26, 2018 from ALS at the age of 57.
The tourist from 'No Pictures Please' makes a main appearance with his common catchphrase "Amazing!".
This is both Princess Mindy and David Hasselhoff's only appearance outside The SpongeBob SquarePants Movie (2004).
Although SpongeBob celebrates his birthday in this episode it actually aired two days before his actual birthday.
At the end of the episode, a lot of famous celebrities appear to wish SpongeBob a happy birthday. Including, Kel Mitchell, Jojo Siwa, Tiffany Haddish, Michael Strahan, RuPaul, Sigourney Weaver and others.