DS is almost 7 months and I read to him here and there (obviously I understand he has no concept of this yet but the pictures are something for him to look at and I know how important it is for him to be exposed to a wide vocabulary) but we don't do it every evening before bed.
Of course there's no harm in doing it from birth but a friend of mine looked at me like I was slightly mad when I said I might add a bedtime story to the evening routine...