Asking god parents

Elle • I threw my pie for you

It is a little early but I’ve chosen who I would like to ask to be god parents, is there a certain time you are ‘supposed’ to ask them? Is there a certain way you are meant to ask as well? Would love to hear opinions and how you asked yours, or how you were asked. I want to ask my sister, her partner and my two best friends if it makes a difference.