Operation Bite: A sneak attack by US forces against Iran is planned for 4am on April 6:

The attack is slated to last for twelve hours … lasting from 4 AM until 4 PM local time. Friday is a holiday in Iran. In the course of the attack, code named Operation Bite, about 20 targets are marked for bombing; the list includes uranium enrichment facilities, research centers, and laboratories.

Or so say Russian Military Sources.