Although it's been Spring for quite a while; I remember reading in my pictorial guide to the Book of Changes (图解易经 - I know, I know...) that Spring was a season for getting up early and going to bed late. Well, at least I'm halfway there.
The Dongba character for spring is a 会意字 - an ideogrammic compound - consisting of sky and wind. Because of course, Spring is windy in these parts.
Pronunciation: ɳy˧˩ - the tone diacritic here - hopefully - means that it's a low falling tone, much like the fourth tone in mandarin. Have a listen - with Mr Li's dog barking in the background (click the IPA).