The Older Peron transgression, a period of unusually warm climate during the Holocene Epoch, begins between 5000 and 4900 BCE and lasts to about 4100 BCE (different climate indices at different locations over the globe yield slightly varying chronologies).

The Older Peron -- a "transgression" in the sense of marine transgression, a period of advancing global sea level -- is a period of generally clement and balmy weather conditions that favors plant growth; warm temperatures force a retreat in the glaciers and ice sheets of the global cryosphere; throughout the period, global sea levels are 2.5 to 4 meters (8 to 13 feet) higher than the twentieth-century average.

The higher sea level lasts for several centuries and erodes coastlines.

(Several locations around the world have "Older Peron terraces" along their coasts as a result.)

Some anthropologists, folklorists, and others have linked the ages of the Older Peron transgression and the Neolithic Subpluvial with tales of a "time of plenty" (Golden Age; Garden of Eden) that occur in the legendary backgrounds of many cultures.