My LO is sleeping 6 - 6 and 1/2 hours over night. But because during the day she is going 4 hours between meals, when "night" begins is constantly changing.
eg. one night it might be 9pm the next it might be 11pm.
So if she goes to sleep at 9pm, she wakes at 3am. To me this isn't STTN because to my mind at 3am the night is not close to being over. But if the next night she sleeps 11-5am then I can see how that is STTN.
I understood that sleeping 6 hours was considered STTN.
So is it a length of hours? or a timeframe? Something else?