Aroma Day in Japan
Aroma Day in Japan is held on February 1. Nioi No Hi. This event in the first decade of the month February is annual. 
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Again, a play on the numbers, 201 can be read as “ni-o-i,” which is the Japanese word for smell or aroma. It’s the only day in the year when you’ll be excused for reminding your colleague of their body smell (almost). Or you could just celebrate at home with scented candles or room spray.
Similar holidays and events, festivals and interesting facts
Backward Day on January 31 (In almost every culture there came a time of year when all the societal rules got turned on their head);
Hug an Economist Day on January 31
Inspire Your Heart With Art Day on January 31
Bubblegum Day on February 1
Decorating With Candy Day on February 1
Ice Cream For Breakfast Day on February 1 (is officially celebrated on the first Saturday of February);
No Politics Day on February 1
Crepe Day on February 2
World Play Your Ukulele Day on February 2