This week marks the beginning of the garden season.

This week may mark the beginning of a huge leap forward in our understanding of the physical world.

A week from tomorrow, the Saturday after next, would mark sixteen years since she had relinquished the baby.

This week marks the fourth anniversary of the war in Iraq.

The second week marks the beginning of regular camp activities.

The next few weeks will mark lots of growth in the baby.

The 5th week marks the start of the embryonic period.

It often seems as if every week marks another season.

Next week marks the first anniversary of the law's enforcement.

This week, however, marks the millennium of a significant event for astronomers.