0 1 2 3 Tue 21 Dec 1937 Sat 01 Jan 1938 Tue 01 Feb 1938 Tue 01 Mar 1938 Mon 21 Mar 1938 Hours Slept Hours Slept Rolling Average Total Time in Bed Total Rolling Average <- Previous Period Next Period -> Date Range: to Offset: hours Data: Hours Slept Hours Laying Awake Total Time in Bed Total Dreams Show: Raw Data Rolling Average Rolling Average: Start from Zero Events: None Major All