Transactions are pulled as they are posted to the issuing institution.
Dependent on the merchant acquirer, processor, gateway and issuer, the time from when a transaction occurs to when it is posted can take from a few minutes to a few days. The date listed in transaction will be as close to the original transaction date as possible.
If you would like to try manually syncing your account to fetch the updated data you can always attempt to do so by:
Visiting your Expense accounts page
Clicking on the options dropdown for your account (•••)
Clicking "Sync Expenses" in the dropdown
Also, keep in mind that you can use Bonsai to calculate your self-employment tax deductions by importing your expenses.