unpunctual

adjectives

not punctual; after the appointed time
unpunctual
antonym
punctual
is similar to
behind schedule
"was behindhand with the rent"
behindhand
is similar to
after the expected or usual time; delayed
"a belated birthday card"; "I'm late for the plane"; "the train is late"; "tardy children are sent to the principal"; "always tardy in making dental appointments"
belated, late, tardy
is similar to
overtaken by night or darkness
"benighted (or nighted) travelers hurrying toward home"
benighted, nighted
is similar to
just before a deadline; at the last minute
"last-minute arrangements"
last-minute