Would anyone have any datapoints to indicate when exactly the waitlist might be checked/processed at T-30d, T-26d, T-22d etc, i.e. is it at midnight 30/26/22 etc days before date of travel, or is it exactly (30x24h / 26x24h / 22x24h) before the scheduled time of departure? I know T-48h is 48 hours on the dot, but just wondering about when is happening earlier on.

As a Plat, have 2 waitlisted upgrades for AY01/02, both were J9+ at T-30d, but neither has cleared. Now down to J3/J5 a week before travel, have been monitoring EF closely to try and get a sense whether J cabin has been gradually selling out, or whether upgrades have been clearing for PAX ahead of me on waitlist. Haven't been able to spot a trend yet (i.e. a sudden drop in J inventory at a particular time/date), but becoming less and less optimistic about upgrades clearing :-/