Just a question on skin line dates!

Are their certain dates you put out skins for certain skins lines? (Project, Arcade etc.) Or are those just chosen when you have the push or ideas for their concepts? I'm asking because I want to get out a Arcade Ekko concept and I want to make sure the arcade skin line is already in the process of visualizing concepts. I have a few more Ekko concepts i'm gonna push to to visualize just this one is one of the major skin line concepts. Hopefully time is on my side.