Depends on the oral and how long it stays in your system.
When I do EPI - I do 20mg's at 0330 before workout - and another 20mg's at 1130 - about 8 hours later. Some will say this causes a "roller coaster" and would rather level load throughout the day. But me - if I can release any LH at night to help ease shutdown - I'm all in. I also take DAA right before I go to bed also.