off-season

[awf-see-zuh n, of-]

noun

a time of year other than the regular or busiest one for a specific activity: Fares are lower in the off-season.
a time of year when business, manufacturing activity, etc., is less than normal or at an unusually low point.

adjective

adverb

in or during the off-season: Traveling off-season is the easiest way to save vacation money.

Origin of off-season

First recorded in 1840–50

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

The Indianapolis Colts, the team that drafted him first overall in 1998, released him during that offseason.
The Injuries That Made Peyton Manning and Tom Brady
Ben Teitelbaum
January 19, 2014

It was the offseason, and in this midday hour the city dozed.
Where the Pavement Ends
John Russell

1848, "a period when business is down," from off (adv.) + season (n.).