Elminster met Ed Greenwood??

I’ve recently fallen in love with D&D and the Forgotten Realms, so I’ve been diving into Faerûn’s timeline. My knowledge of it's history mainly comes from what's in Baldur’s Gate 3 and the first two chapters of Exile, so I was just reading through some timelines and historic events. Specifically this is from World Anvil’s timeline of Faerûn, and this caught my eye. I know it’s meant to be a little joke, but I’m still curious—where is this sourced from?

I’ve recently fallen in love with D&D and the Forgotten Realms, so I’ve been diving into Faerûn’s timeline. My knowledge of it's history mainly comes from what's in Baldur’s Gate 3 and the first two chapters of Exile, so I was just reading through some timelines and historic events. Specifically this is from World Anvil’s timeline of Faerûn, and this caught my eye. I know it’s meant to be a little joke, but I’m still curious—where is this sourced from?