Adnium's time zone is UTC
In order to use day parting effectively, you need to adjust the targeted geos' time zone to Adnium's time zone.
For example:
Campaign A - targeting a country that has an EST as a timezone.
We want to show Campaign A's ads at 7:00pm-11pm EST.
EST is 4 hours behind UTC
So we will have to set up Campaign A's day parting in Adnium, for 11pm-2am.