I am having a little bit of a hard time understanding exactly what A time is. So here's a scenario:
DD wakes from nap at 10:40 and I feed her, which takes 20 minutes. We then talk and have tummy time for a little while and then start our wind down at 11:20. I put her in the crib at 11:35 and it takes her 5 minutes to settle. Then she starts Stage 3/light sleep at 11:40, with deep sleep starting around 12. Is her A time 1 hour or 1 hour 20 minutes?