Doc Searls is likely to sleep between 10 p.m. and 4 a.m.
Doc Searls - Author of The Intention Economy, co-author of The Cluetrain Manifesto, variously connected with stuff at Harvard, NYU and UCSB.
Doc Searls is located in SBA, LGA, BOS, EWR, SFO (Pacific Time (US & Canada) time zone). If the sleeping schedule doesn't appear right, maybe @dsearls hasn't specified the correct timezone in their Twitter profile.
Use the search box to know the sleeping schedule of another Twitter user.