SereneSeasons-1.12.2-1.2.2-universal-012130.jar was posted by Forstride to the Glitchfiend Mods Discord server. 012130 is the mtime timestamp.
SereneSeasons-1.12.2-1.2.2-universal-020800.jar was also posted to the Glitchfiend Mods Discord server, along with Curseforge. 020800 is the mtime timestamp.