Chronology

Chronology is a word meaning 'the study of time'. It comes from the Greek words "chronos" (time) and "logos" (word). The adjective is chronological.
Putting events in chronological order means: listing them in the order in which they happened.
There are many sciences which deal in different ways with chronology. General is sometimes called "periodization". Historical chronology can deal with history or with the geological history of the earth.
When things are put in chronological order it can sometimes be called a "timeline". Adjective- (of a record of events) following the order in which they occurred (kind of like a timeline)