0 1 2 3 Sat 10 Sep 1921 Sat 01 Oct 1921 Tue 01 Nov 1921 Thu 01 Dec 1921 Tue 20 Dec 1921 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