Be sure to update your calendar, the dates for the 15th Gathering 4 Gardner conference have changed to the following:

Wednesday, February 21 – Sunday, February 25, 2024

We know it’s not possible to pick dates that will work for everyone, and we do the best we can to avoid conflicts with other major events within our community. Please bookmark this page and stay tuned for additional updates and announcements!

G4G15 Logo

15th Gathering 4 Gardner Conference (2024)

From February 21 – 25, 2024 in Atlanta, Georgia, G4G participants will assemble, in Martin Gardner’s name, to celebrate recreational mathematics, magic, puzzles, skepticism, science, art, literature, and the intersections of these subjects. Participants will offer presentations, performances, original papers, and exhibits. Countless exchanges of ideas and examples of magic will inspire and delight. Unlike many other conferences, G4G is participatory in nature; all attendees are encouraged to contribute, whether that be a 5-minute presentation, an original paper, a unique exhibit, or a novelty item for the gift exchange.

Quick Links:

Conference Registration

Registration for G4G15 is not yet open.

For information about nominating yourself or others for attendance CLICK HERE.

G4G15 What, When, Where

  • WHAT: The 15th Gathering 4 Gardner Conference
  • WHEN:  February 21 – 25, 2024
  • WHERE: The Ritz-Carlton, Atlanta, Georgia, USA
  • Who usually attends?
    Our participants include professional and amateur mathematicians, magicians and performers, artists, educators, scientists, and anyone who is inspired by the same interdisciplinary curiosity that excited our namesake, Martin Gardner. Attendance for G4G15 is capped at 400 individuals.
  • How much does the conference cost?
    Registration is $TBD with add-ons available for dinners, performances, and the traditional offsite social and sculpture-building event. The registration fee covers four days of presentations in the Ritz-Carlton’s grand ballroom but does not cover food or lodging.
  • What was the previous event like? 
    View some of the presentations and Exchange Gifts from past events:
  • How can I attend? 
    G4G15 is an invitation-only conference; however, you can nominate yourself or others for attendance. If you are interested, please fill out the nomination form and be sure to mention the nominee’s background, passion for Martin Gardner’s legacy, and/or desire to engage with the community. We will be reviewing nominations periodically and will let you know if your nomination is accepted.
  • When does registration open? 
    Registration for G4G15 is not yet open. Bookmark this page and check back for updates.
  • Other questions? 
    For all other questions about G4G15, please contact or visit the complete Frequently Asked Questions.

Four Days of Presentations

G4G14 Presentations

G4G offers opportunities for participants to share their passions and discoveries. The core of the conference consists of 4 days of brief presentations (generally 5 to 6 minutes).  

PLEASE NOTE: There are no presentations on the afternoon of the offsite event. All G4G15 attendees may participate in the offsite event with a purchased ticket. 

Offsite Activities


The Offsite Activities venue is TBD. More details are to be announced.

On Saturday, we are serving lunch, building mathematical sculptures organized by George Hart, and creating opportunities for participants to socialize and explore this vibrant community.

Description of Activities

A Mathematical Walk Around Campus

Join Ron Lancaster for a walk to experience viewing the world through a mathematical lens while getting some exercise. This offsite event will be an opportunity to work with others to answer questions and solve puzzles related to daily life, design, art, architecture, science and recreational mathematics.

Ron is an Associate Professor (Teaching Stream) at the University of Toronto where he teaches mathematics courses for pre-service middle and high school teachers. He has over 20 years of experience teaching grades 7 through 12 mathematics. Ron’s professional activities include consultations and conference presentations in North America, Asia, England, the Middle East, Africa, India and Europe. Ron is an author for the NCTM (The Mathematical Lens) and member of the Advisory Board for the Museum of Mathematics in New York City. He is the recipient of the 2015 Margaret Sinclair Memorial Award Recognizing Innovation and Excellence in Mathematics Education awarded by the Fields Institute.

Evening Entertainment

Thursday and Friday evenings at the conference are times to further connect. A buffet dinner will be served followed by entertainment featuring eclectic performances. Past shows have included close-up and stage magic and variety-style acts from juggling to feats of strength and mental math. This is also a wonderful opportunity to meet the other attendees.

Gift Exchange

G4G14 Gift Exchange

Traditionally, every Gathering conference includes a Gift Exchange in which attendees swap puzzles, magic tricks, artwork, papers, novelty items, books, etc. Participants in the exchange must submit an item for the physical Exchange Bag or a document for the Exchange Book. If you’re looking for inspiration, think of the exchange as something you would be excited to share with Martin Gardner himself. We recommend something original or unique, something made by hand, or something other attendees would enjoy or value. 

Everyone who participates in the Exchange will receive:

  • G4G15 Exchange Bag
  • G4G15 Exchange Book (online only)

Sales Room & Exhibit Room

Sales Room

At G4G15, attendees will have the option of setting up a table in the Sales Room and/or the Exhibit Room.

Sales Room: If you are a vendor and wish to sell items to other G4G attendees (examples: books, sculptures, puzzles, mathy toys, etc.) consider reserving a Sales Table. Only attendees registered for a Sales Table will be permitted to sell their inventory at the conference.

Exhibit Room: If you have something special to share with the G4G community that is either too large or complex to be reproduced for the gift exchange, consider reserving an Exhibit Table. Past exhibit examples include: surprising 3D-printed objects, unusual musical instruments, kinetic sculptures, historical collections, and special edition books, toys, and games.

For both the Sales and Exhibit Room, space is limited and tables are available on a first-come, first-served basis.

Nominate Attendees

G4G15 Nomination Form

You are welcome to nominate new attendees (including yourself) for invitation to G4G15. Please let us know how your nominee will enrich the G4G community. Fill out the form once for each person being nominated.


The G4G15 logo was designed by Scott Kim.

Spoiler alert: before I describe the origin of the G4G15 logo, you may want to try and figure it out yourself. What does this logo have to do with the number 15? What famous puzzle does it refer to? What is the implicit challenge in this logo, why is that interesting, and how can it be solved? – Scott Kim


If you would like to submit an unofficial logo for G4G15, please email us at: