I always assumed heyday came from hay. THat is to say i would spell it hayday. And it comes from the logic that you have to make hay when the grass and the weather are at the prime- and its a great day to make hay...Cillstr 15:21, 5 July 2008 (UTC)
And, in Scotland, haugh is "low-lying rich land, especially along a river (Funk & Wagnell's Dictionary). The Dutch hoogë en mogendë means 'high and mighty'. If hay is matured, harvestable grass, a hay day might be considered a time or season of achievement. Food for thought, anyway. Cheers Bjenks 04:27, 28 November 2009 (UTC)Hay, hagh or haugh. An enclosed estate; rich pasture-land, especially a royal park . Neither hay nor grass—That hobbledehoy state when a youth is neither boy nor man. Make hay while the sun shines—Take time by the forelock; one today is worth two tomorrows.
I was reading the Wikipedia article on Thursday, and saw the following:
Greek uses a number for this day: Πέμπτη Pémpti "fifth," as does Portuguese: quinta-feira "fifth day," Hebrew: "יום חמישי" ("Yom Hamishi" - day fifth) often written 'יום ה ("Yom Hey" - 5th letter Hey day), and Arabic: "يوم الخميس" ("Yom al-Khamīs" - fifth day).
Any possible relation to the Hebrew here? 68.70.88.250 21:00, 1 February 2013 (UTC)