shelf life, expiration dates, use by date, time frames, limited time offer, time and place, always time and place, a right time, specific in temporal location, a when, not where or how, but just the right time, the right era, to happen before this or after that, the right place, at the right time, but at some point, it stops being right. it starts being wrong. shelf life. expirations dates. use by dates. limited time offers. getting out while the getting's still good, always on the high points, always, well, good times.