Noun
(historical) A hungover state of the labor workforce after a weekend spent drinking.
(informal) A Monday on which an individual feels gloomy or depressed, especially because of having to return to work after the weekend.
Source: en.wiktionary.orgBlue Monday how I hate Blue Monday Got to work like a slave all day Here come Tuesday, oh hard Tuesday I'm so tired got no time to play. Fats Domino
Even further in this direction was the electronically sequenced, four-on-the-floor single " Blue Monday ". Source: Internet
New Order also would sample "Uranium" in its 1983 songs " Blue Monday " and "The Beach". Source: Internet
"Blue Monday" was released as a single for a third time to promote the collection. Source: Internet
Some versions contained an extra disc or cassette composed entirely of remixes of "Blue Monday". Source: Internet
Blue Monday, which this year fell on 21 January, has been dubbed the most depressing day of the year, when many face large bills or despair at already breaking New Year resolutions. Source: Internet