0 1 2 3 Tue 14 Dec 1920 Sat 01 Jan 1921 Tue 01 Feb 1921 Tue 01 Mar 1921 Sun 13 Mar 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