Simple query - Mailing list pgsql-php

I am having this problem: i have a calendar wich i order by day
and the time i do display like this format: 10h30min.

this is my query:

$query = "SELECT city, state, location, day, month, time, event FROM agshow
where ((mes=11)) ORDER BY  dia  ASC";

So when i have two presentations on the same day the 15h30min presentation
wad listed after the 21h presentation

Wich query can i write to organize properly? and the time format is ok?
or i have to change it to be readed properly?

thank?s

Ângelo Rigo

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