Etymology: Lasterday

For those of you wondering where the title "Lasterday" comes from, this post is for you.  Our youngest daughter (3) coined the term during one of her many hurried storytelling sessions.  At first her stories began with "Last time ago..." which I assume to be a form of "Once upon a time..." (e.g., "Last time ago my sister frew [threw] up in the dirt; I no lub dat [that was a distasteful experience that did not solicit my love].").  But it is also used in the sense of "before" (e.g., "Mom gave me dem [them] fishy crackers last time ago.").  During one of these urgency-laced stories her limited vocabulary tumbled over the concept of yesterday to form the word lasterday.  And it makes sense: for instance, we don't say yesteryear anymore; instead, in this modern age, we say last year.  So you see, our youngest daughter is really a cutting-edge linguist.  She's pushing the envelope of modern english and teaching us to let the old-timey terminology of yesteryear fade into the purple distance of all our unreachable lasterdays--putting "yesterday" to pasture with white-bearded thees and thous.  We'll see if it catches on ;-)