sleepyti.me is a Javascript/jQuery based bedtime calculator that helps you decide when to go to sleep. It works by counting backwards in 90-minute sleep cycles so that you wake up refreshed and alert (instead of tired and groggy). The main website can be viewed at http://sleepyti.me, or by viewing the "raw source" of this github project.
tylkofarci/sleepyti.me
sleepyti.me is a bedtime calculator that works by counting backwards in sleep cycles from the time you need to wake up.