You have the approximate time frame of the tour. The specific dates will be announced shortly, when they are contracted.
I try to post enough information here to help you with your planning. But there are certain rules that are meant not to be broken, like posting before confirmation or contacts.
As usual in this business, there are any number of issues that effect these things that you all know nothing about, or should know nothing about. Band internal business is not your business, as much as certain frustrated wanna be managers think it is.
My suggestion to Leith is that he find a nice local band and show us all how brilliant his skills are by blowing them up into a national band in six months.