AB testing for date/time, help needed

[Renee]

Can someone explain why if I choose date/time to do the A/B testing, the winner declare needs to be done manually ?

I see it's like a regulation but I don't understand the meaning behind. 

[Mariah_Mattick · Accepted solution]

My assumption is that Marketo would have a difficult registering the date/time winner and then translating that into the 'winning send date/time', since the test dates have already passed.