/ˈbæŋkɪŋ deɪ/ – Phrase
Definition: Ngày làm việc của ngân hàng.
A more thorough explanation: a day on which banks are open to the public for conducting banking functions.
Example: There will be only one banking day from December 24, 2014 until January 4, 2015; banks will only be open on December 29 as all other dates either fall on a weekend or are considered holidays.