n (Australia|obsolete) An itinerant worker, such as a swagman, who arrives at a farm too late in the day to do any work, but readily accepts food and lodging.
n (Australia|obsolete) An itinerant worker, a swagman.
n (nautical) A sea captain who shows harsh discipline by requiring all hands to be on board by sundown.[http://navyadministration.tpub.com/12966/css/12966_381.htm Navy Administration - Glossary]
n (medicine|colloquial) A patient, usually demented, who tends to become agitated in the evening.
n A cocktail consumed at sunset, or to signify the end of the day; cocktail party held in the early evening.