April 2021 premiere weeks
Template:Event April 2021 premiere weeks was 2 weeks worth of premieres that occurred in the UK and Ireland. It started on April 19 and ended on April 30.
Premieres
- Airdates indicate the episodes' premieres in the UK and Ireland.
Week 1
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Week 2
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Trivia
- "Knock Knock, Who's There?," "Pat Hearts Squid," "Plankton's Intern," and "Patrick's Tantrum" all premiered in this event before premiering in the U.S.
- Before its official premiere on April 19, 2021 in this event, "Swamp Mates" accidentally premiered on February 25, 2020.
- Clips from "Lighthouse Louie" were used in promos for this event despite the fact that it premiered on February 12, 2020 in the UK and Ireland, which was over a year before this event.