February 15th, The one day out of the year you can call out someone on their consistent bad breath and or sport some mean breath of your own.
There's a run on tuna and durians, must be National Bad Breath Day.
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November 25 is national breathing day. It is right before thanksgiving so that you can get enough air before you stuff your mouths with food.
โHey Martha, donโt forget that tomorrow is national breathing day, so you can get all that air before thanksgiving