0 1 2 3 Thu 21 Jan 1937 Mon 01 Feb 1937 Mon 01 Mar 1937 Thu 01 Apr 1937 Wed 21 Apr 1937 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