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National Bikini Day

Fun · History · July 5

A look at the bikini, the two-piece swimsuit that became a fixture of American beaches, pools and summer style.

National Bikini Day

National Bikini Day falls on Monday, July 5, 2027. That is 251 days away.

The bikini is a two-piece swimsuit: a top and a separate bottom, with a bare midriff between them. It sounds simple, and in construction it mostly is. That simplicity is a large part of why it lasted.

The name comes from Bikini Atoll, a group of islands in the Pacific Ocean. The swimsuit borrowed the name early on, and it stuck so well that most people now hear the word and think of beachwear rather than geography.

Over time the bikini has taken many forms. There are high-waisted bottoms that look back to older two-piece suits, triangle tops that tie at the neck, sporty cuts built for surfing and volleyball, and versions that cover more or less depending on taste. Fabrics changed too, moving toward stretchy, quick-drying materials that hold their shape in water.

Part of the history here is how the suit moved from novelty to ordinary. Old beach photos, magazine covers and movies trace that shift, and flipping through them is a good way to see how swimwear changed alongside everything else people wore.

Marking the day can be as easy as a trip to the pool, a look through family vacation pictures, or reading a bit about swimsuit design. Anyone sorting through a drawer of summer clothes may find a suit that has outlasted several beach towels.

Ways to celebrate

Dates

YearDate
2026Sunday, July 5
2027Monday, July 5
2028Wednesday, July 5
2029Thursday, July 5
2030Friday, July 5

All national days on July 5

Also on July 5

Categories: Fun daysHistory days