Originally Posted by DrivingRain

Sure, To be more specific: using BA.com While waiting for F inventory to open for my flights in late July on 3 consecutive Sunday evenings at exactly 1030pm edt I found that inventory would open up for "close-in" US flights (i.e. Flights roughly within 14 days of that Sunday). So while I still checked periodically during the week because there were changes here and there, sweeping changes occurred on Sunday nights at 1030. Of course if it was F0 it wouldn't open up--I'm not describing a mistake scenario. It simply seems that on Monday mornings in Hong Kong (i.e. 1030pm edt Sunday) someone at HQ consistently did a run through the inventory and freed it up.