How do archaeologists pinpoint chronologies? Until recently there were two ways to do this: relative dating (placing objects, events etc in sequence) and historical dating (using written evidence). ‘Making a date’ examines the processes and methods of dating and looks at how these methods have changed. Until the late 20th century, the only dates available were those from archaeological connections with the chronologies and calendars established by ancient races. Two techniques used to gauge dates were the ‘varvevs’ (clay deposits) of Scandinavia and the tree-rings of the American South-West. Now, archaeology has a series of scientific methods available.