slow, tedious, sluggish, dull / irritating

an interosseus muscle

a lucky day, auspicious day

(rare) one's birthday

Saturday

(rare) a birthday

a red sun, a bright sun, or the summer sun / a day in the traditional Japanese six-day week which is unlucky except for at noon

the last day of the year, New Year's Eve

the due date / the expiration date (of the term)

(collective, chiefly attributive) Japan and China