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Text Content

 * Sign Up
 * What is Light Pollution?
 * Take Action
 * Events
 * About
 * Partners
 * Photos
 * Support
 * Merch

 * Sign Up
 * What is Light Pollution?
 * Take Action
 * Events
 * About
 * Partners
 * Photos
 * Support
 * Merch


INTERNATIONAL
DARK SKY WEEK 2024




DISCOVER THE NIGHT
APRIL 2–8

It may seem harmless, but light pollution has far-reaching consequences that are
harmful to all living things. Effective outdoor lighting reduces light
pollution, leading to a better quality of life for all. The dark sky movement is
working to bring better lighting to communities around the world so that all
life can thrive.

Join us this International Dark Sky Week to learn more about the movement, and
discover the night where you live.


GET UPDATES

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Comments

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Presented by DarkSky International


LIGHT POLLUTION FROM UNSHIELDED LIGHTS

A lot of the outdoor lighting used at night is inefficient, overly bright,
poorly targeted, improperly shielded, and in many cases, completely unnecessary.
This light and the electricity used to create it are being wasted because it
spills into the sky rather than being focused on the objects and areas that
people need illuminated.
Click Here


CITYSCAPE TO THE MILKY WAY

With much of the Earth’s population living under light-polluted skies, over
lighting is an international concern. If you live in an urban or suburban area
all you have to do to see this type of pollution is go outside at night and look
up at the sky. Notice what you don’t see?
Click Here


HARMFUL EFFECTS ON WILDLIFE

Light pollution harms mammals, birds, amphibians, insects, and reptiles. It can
decrease reproduction, disrupt migration, increase predation, and more.

Learn more


BAD, BETTER, BEST

Use outdoor lighting responsibly by only using it where it’s needed, when it’s
needed, in the amount required, and no more. Make sure to use the lowest light
level required, limit the amount of shorter wavelength (blue-violet) light,
utilize controls (such as timers or motion sensors), and use shielding to target
the light, so it does not spill beyond where it is needed.

Click Here


EFFECTIVE OUTDOOR LIGHTING

A wide variety of dark-sky-friendly lighting fixtures are vailable from
manufacturers.

Learn more
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WHAT IS LIGHT POLLUTION?

Any artificial light that is not needed is a pollutant that has serious and
harmful consequences.

Light pollution can:

 * disrupt wildlife
 * impact human health
 * waste money and energy
 * contribute to climate change
 * block our view of the universe

Light pollution is increasing at 2x rate of population growth and 83% of the
global population lives under a light-polluted sky.


TAKE ACTION


BE A COMMUNITY SCIENTIST

Globe at Night’s community scientists measure and submit their night sky
brightness observations. It’s easy to get involved — all you need is computer or
smartphone.

Visit Globe at Night
Watch video


INVENTORY YOUR HOME LIGHTING

Is your home night sky friendly? A few simple changes can lead to home lighting
that is both beautiful and functional, without contributing excessive light
pollution.

Learn more


HOST A NIGHT WALK

Dark City Walks are guided walking tours that demonstrate how the lighting we
add to our cities impacts the way we use them and the environment at large.

Watch the video
Download How-To Guide [PDF]


BECOME A DARKSKY ADVOCATE

DarkSky Advocates around the world educate the public about light pollution,
enact legislation, serve as local resources for other volunteers, and more. Join
us!

Learn more


PARTNER WITH OTHER ORGS

Connect with a partner organization and tell them about the importance of
reducing light pollution — or better yet, host an event with them to help
introduce new audiences to the value of dark skies.

Partner ideas [PDF]
Event ideas [PDF]


JOIN IN THE SCAVENGER HUNT

Discover the night by taking part in the International Dark Sky Week scavenger
hunt! Find as many items on the list as you can during the week. Find them all,
and IDA will send you an assortment of stickers!

Get hunting
Claim your stickers


GET AN OFFICIAL PROCLAMATION

Get Dark Sky Week officially proclaimed or recognized by a local government
agency. This can get picked up by local media and really helps get the word out.
In 2022, we had 23 successful proclamations in the United States. Our goal is to
have at least 100 IDSW proclamations worldwide in 2023.

Learn how [Google Doc]


WRITE A LETTER TO THE EDITOR

Letters to the editor (LTE) can be a compelling way to raise awareness about an
issue. They are some of the most read pieces in newspapers or magazines. Writing
an LTE about dark skies can inform the public about light pollution issues they
are likely not aware of.

Learn how [Box]


ABOUT US


DARKSKY PROTECTS THE NIGHT FROM LIGHT POLLUTION

Artificial light at night has revolutionized the way we live and work outdoors,
but it has come at a price. When used indiscriminately, outdoor lighting can
disrupt wildlife, impact human health, waste money, and energy, contribute to
climate change, and block our view of the universe. 

The DarkSky International promotes win-win solutions that allow people to
appreciate dark, star-filled skies while enjoying the benefits of responsible
outdoor lighting.




OUR VISION

The night sky, filled with stars, is celebrated and protected around the world
as a shared heritage benefiting all living things.

Thank you to our corporate partners for year-round support

Leading Partners



Sustaining Partners



Ally partners



Associate Partners



Presenting Partners



The National Park Services preserves, to the greatest extent possible, the
natural lightscapes of parks by supporting system wide restoration of night sky
resources and values, advancing scientific understanding, and inspiring public
appreciation of night skies.

Outreach partners










EVENTS


ALL AROUND THE WORLD

View Calendar



YOUR DARK SKY PHOTOS

Tag your Instagram posts with either #IDSW2024, #DarkSkyWeek, or
#DiscoverTheNight.

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SUPPORT DARK SKIES!

Can you pitch in a few dollars a month to protect the night? Support DarkSky
International by becoming a monthly member today. When you join our monthly
giving club, you will receive a special Nighthawk magnet.

Donate now


BUY DARK SKY MERCHANDISE

Printed in small batches. Lots of designs, styles, and sizes are available.
Proceeds support the International Dark-Sky Association.

Visit the shop

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