It takes 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. Also many financial institutions do not process payments on weekends or holidays, which can affect when refunds reach taxpayers. For EITC and ACTC filers, the three-day holiday weekend involving President’s Day affects their refund timing.

https://www.irs.gov/individuals/refund-timing