Well, generally run down and recovering from a pre-Christmas virus y13 daughter has now slept from 8 am to 7 pm today.....
WHAT's THE BEST THING TO DO???
Nudge her back... so wakes up earlier and earlier over next few days....
Or Nudge her forward, which in many ways would be much easier... so going to sleep later and later til eventually she catches up with herself! eg Stays up to midday tomorrow (17 hour "day"), 4pm the next day, 8pm the next... and hopefully then back to "normal".
Even virus free she finds it very tough to get to sleep with a racing mind, probably exacerbated by pills she takes for her ADHD.