I'm looking for a reliable predictor of how Amex dates the posting for charges that hit over a holiday weekend, and also how they adjust statement closing dates when the regular statement closing date would hit on a holiday weekend.

For example, on my SPG card, the statement typically closes on the 2nd of every month - but in some months, when the 2nd falls on a weekend day, the statement actually closes a day or two earlier.

I'm trying to time a large purchase (down payment on a new car), and will be making the purchase on or around the 2nd of the month (in this case, July 2nd, a Saturday – so not just on a saturday but both a saturday and a holiday weekend). I would rather that the charge hits my next/following statement, rather than on the statement that closes on the 2nd (that is, I'd rather have 6 weeks to pay that off, rather than 2 weeks). The goal is for the charge to post on the next statement .

Can anyone here articulate what the "rules" are for when statement closing dates move if they would otherwise fall on a holiday weekend?

Thanks.