watershed n.— «Jargon watch: when people talk about “the watershed,” they mean the difference between 8 pm and earlier, when kids might be watching, and 9 pm, when if kids are still up, it’s their parents’ fault. Our...
shoulder peak n. a period that precedes or follows regular peaks of heavy use or service, such as in television viewing or electricity consumption. Also shoulder. (source: Double-Tongued Dictionary)