When we receive an invoice.paid event from Stripe, we create a corresponding Order in our system. Naturally, we let the created_at property to the default, i.e. NOW(). Similarly, we create payment transactions when receiving payment success events.

It could be nice to use instead the creation timestamp provided by Stripe (i.e. their invoice or payment creation date). It doesn't make a difference in production, but in local development, it could be really nice when using Test Clocks: we can advance time in Stripe and our orders/transactions would also reflect that simulated time.