Unlucky days are days where things seem to go wrong, and misfortune prevails. There are various synonyms for these unfortunate days, including inauspicious, ill-fated, cursed, ominous, and jinxed. An inauspicious day suggests bad luck or unfavorable conditions, while an ill-fated day is one plagued by tragedy or disaster. A cursed day indicates divine punishment or a hex, while an ominous day is marked by a sense of foreboding or impending doom. Lastly, a jinxed day is one where everything seems to go wrong, often due to a hex or bad luck. Whatever the term, it is best to take caution on these days to avoid any further setbacks or misfortunes.