Islamabad is 9 hours ahead of Caracas
Best overlap: 8:00 AM to 9:00 AM in Caracas is 5:00 PM to 6:00 PM in Islamabad.
The overlap falls at 8:00 AM to 9:00 AM in Caracas, or 5:00 PM to 6:00 PM if you're in Islamabad. The overlap is tight at roughly 1 hour, so protect it: 8:00 AM in Caracas / 5:00 PM in Islamabad is your safest recurring slot.