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- January 10-11: Adam P. Goucher proves that no finite phoenix oscillators exists at periods 3 through 25.
- January 9-12: Keith Amling discovers and Matthias Merzenich reduces the first period-9 c/3 backrake, the lowest possible period for a c/3 rake. May13, Evin, Merzenich, and Amling use this to construct the first c/3 rakes of periods 18, 63, 99, 117, and 126.
- January 9: Keith Amling reduces the known upper bound on the average agar density from 320/559 ≈ 0.572 to 1176/2087 ≈ 0.563. The highest average density is conjectured to be 1/2.
- January 5: May13 discovers (using qfind) the first period-9 4c/9 orthogonal spaceship in a Life-like cellular automaton (B3567/S14578), fitting within a 19 × 676 bounding box in one phase.
- January 1: Layz Boi discovers (using WLS) two new p2 lightspeed spaceships in Life-like rules containing both B2 and B3 but not B0 or B1, increasing the number of such rules in which spaceships are known to 10 (of the 8192 without S0 that have not been disproved).
- December 26: Goldtiger997 uses QuFince to find a 15-glider synthesis for the last remaining 17-bit still life that had cost 16 gliders -- completing the "17-in-15" project.
- December 21-29: May13 finds a c/4 p80 puffer, which several days later is cleaned up by David Bell (and independently by May13) to produce complete c/4 p80 rakes.