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Light pollution is the human-made alteration of outdoor light levels from those ocurring naturally. It has harmful effects on:

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International Dark Sky Week (April 5-12) is just over a month away. So, we are very excited to announce that International Dark Sky Week t-shirts, tank tops, and sweatshirts are available now! There are a variety of designs to choose from, including women’s fit, kids, and hoodies so that everyone can celebrate International Dark Sky Week 2021 in style. Just be sure to place your order soon to allow time for your merchandise to be printed and shipped. International shipping is available.
The merchandise will be sold and printed in batches. The campaigns run for 2 days. During that time window, whoever orders will have their items printed and shipped to them as soon as the campaign ends. Once the campaign ends, domestic orders will be delivered in approximately 7-14 business days. The delivery times for international orders can vary depending on the location. Please note that these estimates reflect approximate delivery times once the campaign ends and not when you place your order. Campaigns will restart every 2 days for a new batch and run through International Dark Sky Week 2021.

Each year, DarkSky International updates the latest results from scientific studies of ALAN
