How long can it take a bank to release my refund

[CassieLO]

Each financial institution is different. It can take additional time for refunds to be processed after leaving the IRS, and for financial institutions to accept and deposit them to bank accounts and products like debit cards. Holidays can also impact the date refunds are available.

Where's My Refund? on IRS.gov and the IRS2Go mobile app remains the best way to check the status of a refund. 

From the IRS:
https://www.irs.gov/individuals/refund-timing