The neuron is keyed to the appearance of quantification—it lights up on words immediately surrounding numerical values (e.g. headers, labels, or items paired with a number).
Looking at the high activations, I can see extremely large values (in the thousands) for tokens like "August" (4270), "December" (2161), "topics" (3829), "media" (3652), "play" (3612), "things" (