Below is code that'll do this at 10.1. You're going to have to figure out which field you want to sort by (i'm using shape_area).
If you wanted to do this with the old cursor (arcpy.UpdateCursor vs arcpy.da.UpdateCursor) the code would be slightly different.
- copy your data
- modify code below to work with copy of your data
tab = r'e:\test\f.gdb\fc1' # table being acted on
date = datetime.datetime(2004, 1, 1, 0, 0, 0) # start date
delta = datetime.timedelta(seconds=6) # time offset
field_names = ('shape_area', 'datefield',),
sql_clause = ('','ORDER BY shape_area')) as cur:
for row in cur:
row = date
date += delta