Top item in the activity stream is under heading "October 05 - 10:00 PM"

Our date formats:
Format Example
Time Format kk:mm 'UTC' 14:41 UTC
Day Format EEEE kk:mm 'UTC' Tuesday 14:41 UTC
Complete Date/Time Format yyyy-MM-dd kk:mm 'UTC' 2009-10-06 14:41 UTC
Day/Month/Year Format yyyy-MM-dd 2009-10-06
Date Picker Format (javascript format) d/MMM/yy (%e/%b/%y) 6/Oct/09
Date Time Picker Format (javascript format) dd/MMM/yy hh:mm a (%e/%b/%y %I:%M %p) 06/Oct/09 02:41 PM