Game concept · Advanced Activities
Grand Wedding Promise
The game also links it as Grand Wedding Promises, Promised.
From the game's encyclopedia
A Betrothal with the promise attached that a Grand Wedding will be celebrated for the union of the two characters involved.
The Grand Wedding Promise will expire after 3 years. Not organizing a Grand Wedding in time or breaking the Betrothal will bear punishing consequences.
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.
Grand Wedding Promise is an entry of Crusader Kings III's in-game encyclopedia (Advanced Activities). The game explains it: "A Betrothal with the promise attached that a Grand Wedding will be celebrated for the union of the two characters involved." It is part of Grand Activity. The game also links it as Grand Wedding Promises and Promised. Patch 1.20.1.2, from game/common/game_concepts/04_ep2_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/04_ep2_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.