Postgresql: split month by hours

gistfile1.sql

with dates as (
select 
		(date_trunc('MONTH', NOW()))::timestamp without time zone --first date of month
		+ concat(
			generate_series(
				0, 
				24
				* to_char((date_trunc('MONTH', NOW()) + INTERVAL '1 MONTH - 1 day'), 'DD')::smallint --last day of month
				-1 
			), --hours in month
			' HOUR'
		)::interval as date
)
select *
from dates