Srila Prabhupad says,"One Minute. That's Krishna Consciousness movement. One minute. Krsna says sarva dharman parityajya mam, ekam saranam vraja, aham tvam sarva papebhyo moksayisyami, You surrender unto Me. Give up your all business, I will give you relief from all sinful reaction immediately. So it requires one Minute. My dear Krsna, I was forgotten. Now I understand, I fully surrender unto you. Then you become immediately free from all sinful reactions. Without any reservations, without any politics, if you fully surrender, Krsna is assuring, aham tvam sarva-papebhyo moksayisyami ma sucah. He reassures, "Don't worry whether I will be able to give your relief from all reaction," Ma sucah. Finished Guaranteed. You do this." So how much time it requires to surrender to Krsna? Immediately you can do that. Surrender means you surrender and work as Krsna says. That is surrender.