Libra Festival

The Libra Festival (天秤祭) (called the "Scale Festival" in Crunchyroll subs) was an event that took place in Akiba during the first October after the Catastrophe.

Overview
The Round Table Alliance held a festival for the autumn season that was organized by the Production Guild Liaison Committee; in the anime, Marielle whined about it until it was approved.

Trivia

 * While "Scale Festival" is a literal reading of the Japanese name, the name is meant to reference the astrological sign, as the festival occurs during Libra's duration.