Game concept · All Under Heaven
Favored Era
The game also links it as Favored Era's.
From the game's encyclopedia
The Favored Era is the will of Heaven manifested by Son of Heaven about the course of the Dynastic Cycle. It determines which Stable Era will be enacted after Unstable Era is over.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Favored Era is an entry of Crusader Kings III's in-game encyclopedia (All Under Heaven). The game explains it: "The Favored Era is the will of Heaven manifested by Son of Heaven about the course of the Dynastic Cycle." It is part of dynastic_cycle_era_short. The game also links it as Favored Era's. Patch 1.20.1.2, from game/common/game_concepts/tgp_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/tgp_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.