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A comment on What I learned by living without artificial light. Parent comment

Re:What I learned by living without artificial light by sizzle on Thursday April 26, 2018 @01:27PM (#16933837)
Check out this great REM sleep calculator

www.sleepyti.me

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Re:What I learned by living without artificial light by jedberg on Thursday April 26, 2018 @06:13PM (#16936389)
Been using that for many years! Any time I have to be up at a certain time (and use an alarm) I use that to make sure I'm getting to bed at the right time.
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