Note: This is referring to the American term for special celebrations, not the UK term for Vacations.
Holidays are seasonal events in Tomodachi Bliss. On certain holidays (such as Christmas), there will be food associated with the current holiday available to buy on that day only in the daily specials at the Food Mart. After the item has been bought, it will appear in the regular food catalog.
JP Holiday Food
January 1st: O-sechi (Japanese New Year food), Mochi Soup (O-souni)
February 3rd: Setsubun Holiday, large sushi roll (ehoumaki) and roasted beans (fukumame)
February 14th: Valentine's Day: Box of chocolates (giri-choco) and hand made (fukumame)
Christmas Eve: Roast turkey with all the trimmings.
Birthday
On the player's birthday, a special event will be held where the player will be presented with a birthday cake by the islanders. This cannot be bought in shops, but will be added to the item list. The player's look-alike will also have a news broadcast with their birthday announced. Other Mii islanders will also have a special news cast broadcast for their birthday, but no cake will be given out.
The birthday song is to the tune of the traditional "Happy Birthday" song with the lyrics changed to "la la la", except the line "Dear [Mii]", possibly because the song was copyrighted when the game came out.
New Year's Day
On the 1st week of January, shopkeepers say "Happy New Year!" and Miis wish the player a happy new year as well.
On the 1st day of January, the first Mii News broadcast watched in a certain year is mentioned that it is the first news broadcast of the year.
The island may or may not still have the Christmas theme on January 1st.
Australia Day (AU)
On the 26th of January, all the shops will be decorated with Australian flags and balloons. Australia day celebrates the day Australia was first discovered by British explorers in 1788, becoming a part of the British Empire.
There is no special food for this day.
Super Bowl (US)
On the day of the Super Bowl in early February, the shopkeepers will wear football uniforms. The Food Mart will be decorated with a football and a football poster.
There is no special food for this day.
National Day (JP)
On February 11th, all the shops will be decorated with Japanese balloons and the flag of Japan. National Day celebrates the day the mythical Emperor Jimmi sat on the throne in 660 BCE.
There's no special food for this day.
Valentine's Day
On February 14th, some shops will be decorated with Valentine-themed designs. For example, the Hat shop has three heart balloons. All shopkeepers will be in a pink-colored basic shirt (Western only). There will be special Valentine's Day chocolates sold in the Food Mart (Japan and Europe only).
Mardi Gras (US)
On February 21st, some shops will be decorated with Mardi Gras-themed designs. For example, the hat shop has bead necklaces. For the clothing shop, the shopkeepers will wear Mardi Gras clothing, and a Mardi Gras mask. They will also put up a Mardi Gras poster.
There is no special food for this day.
St. Patrick's Day (US)
On March 17th, Pots of gold will be around parts of the island. The shops will also be decorated with St. Patrick's Day items, such as shopkeepers wearing a Leprechaun outfits and having four leaf clovers in certain stores.
