You're about 10-15 years too late for this. In the past, award seats were released predictably when the schedule opened, now it can be anytime, as Scottish Poet said, driven by algorithms - an expected / anticipated demend. If you are US based you should also consider the date when schools in the UK have their holidays, which differs if you go to state ( government ) school or fee paying private schools, both have their holidays at different times, but BA has that built in to their calculation, as well as major UK holidays, i.e Easter