Somewhere about the 20th we are told that there will be a transfer for a given store. No amount is specified, but there is an approximate date when the transfer is supposed to be made.
Somewhere about the 29th, these transfer show up in my bank account. Naturally it varies. Weekends can mess it up, and December payment is usually made a few days ahead, to avoid the problem where Amazon shows a payment in 2017 but the recipient thinks it arrived in 2018. March and April might be a bit thrown off by the fact that February has only 28 or 29 days. Etc. It is not something I worry about, since February 2008 they have always arrived more or less on schedule.
It take s only a couple of days, to transfer payment to your bank account, if you are an US citizen other. If you live outside US you have to have a bank account linked to Paypal, It will take up to 25 days, when they transfer your money, when you will have 100$ in your account of sales.
The payments show up 60 days after the end of the month in which they are earned, which I think may be what you want to know. So if you sell a book in June, you will receive the payment the end of August.