This article contains a(n) episode that will air on TV on TBA 2021 in the US. The information may rapidly change as soon as more details become available. To prevent speculation, please add reliable sources to the unreleased media.

"Happy Birthday Mailbox" is the fifteenth episode of the second season and the thirty-fifth episode overall in the reboot series Blue's Clues & You!. It is a new version of "Mailbox's Birthday".



We play Blue's Clues to figure out what Mailbox's birthday party is.


  • Question: TBA
  • Clues: TBA
  • Answer: TBA
  • Wrong Answer TBA
  • Skidoo: Birthday World




Blue's Birthday Skidoo! 🎂 - Blue's Clues & You!


  • This episode has premiered on April 28, 2021 in the UK according to NickALive. It will be released on US TV, but on an unknown date have to wait for unknown date.
    • This is the third episode to premiere on TV outside the US.
  • This is the first reboot episode where the viewers get a letter.
  • Birthday World is very similar to Birthdayland from Blue's Birthday Adventure.
  • This is the second time mailbox's birthday is celebrated.
Blue's Clues & You! episodes
Season 1
"Meet Josh!" • "Playdate with Magenta" • "Big News with Blue" • "ABC's with Blue" • "123's with Blue" • "Sad Day with Blue" • "Laugh with Blue" • "Song Time with Blue" • "Getting Glasses With Magenta" • "Growing with Blue" • "Happy Birthday Blue" • "Story Time with Blue" • "The Thinking Squad" • "Science with Blue" • "Colors Everywhere with Blue" • "Pajama Party with Blue" • "Bluestock Remake" • "Spooky Costume Party with Blue" • "Thankful with Blue" • "Getting Healthy with Blue"
Season 2
"Blue's Big Beat Band" • "Hide and Seek with Blue" • "Blue's Treasure Hunt" • "Welcome to Blue's Bistro" • "Blue's Big Baking Show" • "Blue's Night Before Christmas" • "Sleepy Singalong with Blue" • "Blue's Big Dance Party" • "Blue's Big Imagination" • "What I Like About Blue" • "Blue's Show and Tell Surprise" • "Blue's Rainy Day Rainbow" • "Spring is Here!" • "Blue's Anywhere Box Surprise" • "Happy Birthday Mailbox" • "Blue's Big Neighborhood Adventure" • "Blue's Beach Bonanza"
Season 3
Season 4
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