TITLE: GCN CIRCULAR NUMBER: 43276 SUBJECT: Fermi Gamma-ray Burst Monitor trigger 788833547/251231018 is not a GRB DATE: 25/12/31 02:32:09 GMT FROM: Glowbug DEV B. Hristov (UAH) reports on behalf of the Fermi Gamma-ray Burst Monitor Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 788833547/251231018 at 00:25:42.73 UT on 31 December 2025, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to a Solar flare."