You may have to check your local speaker of finance.
In the US, day can have the connotation of day of the week.
Q: What day does the shop close?
A: Monday.
The shop will be open on Tuesday.
Q: What date does the shop close?
A: April 1, 2015.
That's likely the last day the shop is open.
In the US, "closing date" is the technical term f