Our 2 year old has been waking up since June at 4 am. She used to be a stellar sleeper- 7-7 and woke up once for a feeding (milk). Not sure why the sudden change. We tried everything suggested by others- less nap, no nap, longer nap, later bed time, bigger dinner, snack before bed, more activiities, letting her cry it out.....daddy is up at 4:30 but that never bothered her before. Advice would be much appreciated. Thank you!!