I have seen in credit card and even debit card transaction two dates associated with each completed transaction. The date it was processed by the bank which one of my cards calls the post date, and the date the card was scanned by the merchant which they call the transaction date.
Many times the dates are the same, many times they can be separated by a day ...
If you paid for something on a credit card, that's a credit to Liabilities:Credit Card, which means you will have to debit Expenses:Others. That's what you'd do if you bought something for yourself, for example if you bought an airline ticket:
Liabilities:Credit Card $400
But that's not ...