Which choice uses a colon correctly?

The library opens at 10:00 a.m. Saturday.

The library opens at 10;00 Saturday.

The library: closes at 5:00 p.m.

The library closes: at 500 p.m.

The library opens at 10:00 a.m. Saturday.

The choice that uses a colon correctly is:

The library: closes at 5:00 p.m.