Business days and public holidays: the date N business days from a date, business days between two dates (with Brazil's du/252), whether a date is a business day with the previous and next, or a year's holidays. Calendars: US federal, Federal Reserve, NYSE, Japan, Brazil (ANBIMA), Canada and provinces, UK nations and ECB TARGET, with substitute and observed days. For settlement dates, filing deadlines and SLA schedules. Each answer names its rule source.

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