In the gameofficer

Founding letter

The GM records the day the guild was born, and whoever joins in the next 14 days becomes a founding member.

In your game: Founding

What it does: A window with the founding date and the arrows to change it. The GM records it; an officer who is not the GM suggests a date. The founding goes to the guild and to guildos.me, and whoever joined by the end of the 14th day after it becomes a founding member, with a badge in the Roster and a place in the guild's book.
Who sees it: The GM and the officers, only on WoW: Forever. The badge shows to everyone with the addon.
Where to find it: It opens by itself for the GM on entering the game, while the guild has no founding. After that, in Settings › Officer, on the Record founding button (for an officer, Suggest founding date to your GM). Switch it on and off in Settings › General › Modules.

How it should behave

The date goes from 4 November 2026 to today, one day per click on the arrows. It is a calendar day in UTC, the game's.
The letter already opens on a date: the one an officer suggested; otherwise, the earliest day the addon saw anyone from today's roster, never before the launch; otherwise, today.
A founding member is whoever joined by the end of the 14th day after the founding, the GM always, and up to 5 added by hand on the site's founding page.
The Later button keeps the letter for a day. The third time, it stops opening by itself and stays in Settings.
An officer's suggestion shows in the GM's letter (Suggested by …) and is sent again in the officers' sync, until the GM records.
The most recent record wins, in the game or on the site. On a tie of time, the higher revision wins.
Whoever leaves the guild loses the badge and does not get it back by returning. Only an addition by hand gives it back.
The summary on entering the game says who joined as a founder, up to 3 names, how many days are left in the window, when it closes, and the 1, 3 and 6 month anniversaries and each year's.

The letter does not open before the launch, nor for whoever is not the GM, nor when the guild already has a founding.
A founder's join date is when the addon first saw the person in the guild: the game does not say when someone joined.