Just want to begin by saying I know I am very lucky and some people would kill for this 'problem' 
My 1yo has always been a good sleeper. For months she's slept around 12 hours every night, going down around 7:30. Over the past few days she's occasionally fallen asleep in her buggy on the way home, before 6. I leave her in the hall, where she generally wakes up cranky as hell, cries while I change her, breastfeeds and goes back to sleep. The first time I was convinced she'd be up again really early the next morning but no, slept 14 hours!
My question is, should I be putting her to bed earlier every day? Also should I worry that she's not having any tea on the evenings she does fall asleep in the buggy? I've tried offering some food but she's clearly just wanting to feed and get back to sleep.