Does the International Date Line pass through Greenwich?

No, the International Date Line does not pass through
Greenwich, England.  The International Date Line is only in the Pacific Ocean, on more
or less the exact opposite side of the world from
Greenwich.

The International Date Line is (more or less)
the continuation (or the opposite side) of the Prime Meridian.  The Prime Meridian does
pass through Greenwich.  However, the Date Line is confined to the other side of the
world.  In other words, the Prime Meridian is at 0 degrees of longitude while (most of)
the International Date Line is at 180 degrees.

For more
details about the International Date Line, please follow the link that I have
provided.