select
  to_char(date_table.backcount,'FMDay'),
  to_char(date_table.backcount,'FMDD FMMon FMYYYY'),
  sum(case when yt is null then 0 else 1 end)

from (
    select  date_trunc('day', current_timestamp) - x * interval '1 day' as backcount
    from  generate_series(0, (select cast(extract(doy from cast('20081231' as date)) as integer))) as f(x) -- count back one year
  ) 
	as date_table

left join your_table yt on (date_trunc('day', yt.date::timestamptz) = date_table.backcount)

group by date_table.backcount

order by date_table.backcount desc