About National Flashlight Day
National Flashlight Day is marked on December 21st, the longest night of the year.
- Did you know? The flashlight was invented in 1898 by Joshua Lionel Cowen.
Similar Observances
National Hammock Day
Today’s reason to celebrate reminds us to slow down, breathe easy and enjoy these beautiful summer months.
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National Thermal Engineering Day
The Heat is On! National Thermal Engineering Day is on July 24th as that is the hottest day of the year.
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National Waterpark Day 🌊
Make a splash on National Waterpark Day with thrilling rides, wave pools, and family fun. Dive into excitement at waterparks nationwide!
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Other Observances on December 21st 2025
Winter Solstice
The arrival of the shortest day of the year has been celebrated since the dawn of mankind.
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