How can I see the sleep time(s) of my mac for a specific date?
Found the answer in this so question:how to find out the start time of last sleep
Luckily the date I had in mind wasn't too long ago so I was able to use
pmset -g log|grep -e " Sleep " -e " Wake "
For 10.9 and earlier, you could use the application Sleep Monitor.
Sleep Monitor is an application I wrote that produces logs and graphs of power on/off, sleep, wake, and battery levels:
