In the film community, the months of January and February are considered "dump months." This refers to the time of the year when studios release movies that they don't anticipate to do well commercially or critically. A film can be considered dump-month-worthy for a variety of reasons, such as receiving poor test screenings, casting lesser-known stars, or being difficult to market.
Source：https://www.cbr.com/successful-movies-released-dump-months/
