Islamobad is GMT +5, so it had to be Sunday.
Yes, I figured the same. But, since the article doesn't provide both a date and a time in a specific time zone, and was posted roughly 11.5 hours after the event (assuming we've deciphered the date/time correctly,) there remains some doubt. Both time zone and am/pm errors are quite common.
For example, it is not unusual for even technical people to use "GMT" to mean "BST" (British Summer Time--which is what the British call their time zone when daylight saving time is in effect.) So, if "1504" actually means "3:04 am BST, Mon 24 Oct 2005" then the quake happened about an hour ago, instead of 12 hours ago.