Support Long Now

Long Now Membership

Members can sign in and make a one-time donation.

Become a Member

One-time Donation using PayPal

Donate a single payment, of any value, using the button below.

US Checks and Money Orders can be sent to:

The Long Now Foundation
Fort Mason Center
2 Marina Blvd, Bldg A
San Francisco, CA 94123 - 1284

The Long Now also accepts stock transfers through First Republic Securities. Please email services@longnow.org for details.

Bitcoin payments through Coinbase.com

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The Long Now Foundation is a 501 (c)(3) nonprofit corporation;
our Tax ID number is 68-0384748. Additionally, Your company might offer matching grants for donations you make. Please email services@longnow.org for details.

If you'd like to be part of something ambitious, visionary, and downright monumental, consider making a donation or joining as a member of Long Now. In return, Long Now offers you the opportunity, as Stewart Brand says, to be instructed, amused and even inspired. Your contribution is tax deductible, of course.

Seminar Sponsorship

Our monthly Seminars About Long-term Thinking are made possible through the generous support of our Seminar Sponsors and Long Now Members.

We offer $5,000 and $15,000 annual Sponsorships; $15,000 Sponsors are invited to attend dinner with the speaker after each Seminar, and $5,000 Sponsors may choose to attend any four dinners during the sponsored year.

Contact Laura Welcher at 717.673.8822 or at laura@longnow.org

The Long Now Foundation is a nonprofit organization that relies completely on private gifts and grants to fund its projects and programs. Every gift is important to us and helps make possible the creation of the 10,000-Year Clock, the formation of a 10,000-Year Library, and the knowledge-sharing work we do.

Clock Interest List

The full scale 10,000 Year Clock is now under construction. While there is no completion date scheduled, we do plan to open it the public once it is ready.


If you are interested in volunteering your time and expertise to Long Now, tell us about yourself in an email to services@longnow.org.