Is a day in Venus's longer then its year?

Yes and no. It depends on which "day" you mean.

Venus rotates very slowly on its axis. A "sidereal day" (rotation period) is about 243 Earth days.

There's also the "solar day". That depends on the apparent movement of the Sun around the sky. The orbital motion of Venus around the Sun combines with the rotation of Venus to give a solar day length of about 117 Earth days.

A "year" on Venus is about 225 Earth days. That's the time to orbit the Sun.

That means the sidereal day is longer than the year, but the solar day is shorter than the year.