Warning: a lot of talk about stillbirths.
I think I may have a plausible answer to how Barristan knew about Ashara's stillborn girl when no one else seemingly does, but I'm curious what other people think.
When discussing this, people always seem to take the information that Ashara had stillbirth at face value, while not asking how Barristan could have come to know this, why nobody else in Westeros never mentioned it, or whether it’s even true. Though in this case, I’ll be assuming the
This is not accurate.
Winter did not return 'on the first day of 282'. Snow began to fall in KL on that day.
Winter returns when the false spring ends, but before the false spring begins its been winter and noticeably warm(ing)* for maybe 6 months up to almost a year.
*in the quote below, its still winter (winter's end is nigh) but the snows have been melting, the woods greening, the days growing longer, and they must have been doing that before Whent visited his family and the tourne