Temis the Vorta wrote:
The one thing that would upend this theory is: has the year the flashsideways are taking place in ever been established? It "should" be happening in November 2004, right?
Lindelof established in a podcast that the date of flight 815 in the flashsideways is the same as the date in the pilot episode, September something 2004. Claire's ultrasound machine had the date off by a month, late October 2004, but Lindelof's explanation was that the machine was malfunctioning.