Horvitz's Gnomons was exhibited at the New Museum in 2014, featuring four works based on the concept of time. The final work was a performance piece titled Let us Keep our Own Noon, where volunteers rang brass bells in the streets around the museum at solar noon and then walked away from each other until they could not hear other bells. The piece was performed again in 2016 for the 10th anniversary of “Sequences”, Reykjavík's biennial festival of “real time art”.
