The payout timeline is the same for all Achievers (Donors, Recipients, and Purchasers of 1-Packs).
From the date of purchase and/or date of grant recipient position activation (not application approval date, though they can be the same date in some cases), regardless of day of the month, that month is considered Month 0.
The following month is Month 1 which is waiting month during which no payouts, except Thank You Bonuses from sales made in Month 0, are paid.
In Month 2, monthly payouts begin according to the payout maturity schedule.