Yestertime- (n.) a non-specific referrence to the very recent past when something happened or something was supposed to happen. syn. Lastertime, Yesterday (etymology: North America 2000 Allegra Davis a small child invented the word from yesterday, last-time and yesteryear mix)
"Mommy, yestertime you let me swim naked in Nana's pool."
"You said yestertime you would put that horn on my bike?"