IDSW meaning in International ?

Answer: What is International Dark Skies Week mean?

International Dark Sky Week (formerly the National Dark Sky Week) is held during the week of the new moon in April, when people worldwide may turn off their lights to observe the beauty of the night sky without light pollution. This event was founded in 2003 by high school student Jennifer Barlow of Midlothian, Virginia. It has been endorsed by the International Dark-Sky Association, the American Astronomical Society, the Astronomical League, and Sky & Telescope.

reference

Full Form	Category
Intellectual Deep South Watch	Academic & Science
I Drink Sausage Water	Community
Identification Switch	Computing
Integrated Digital Systems Software	Computing
In de swarte wereld	General
Inverse Distance Squared Weighting	General
I Drink Sewer Water	General
International Dark Sky Week	Governmental
Information Desk standards Water	Governmental
International Dark Skies Week	International