Business Days in May 1999

May 1999 has 21 business days under the US federal holiday calendar. The month spans 31 calendar days, of which 10 fall on Saturday or Sunday and 0 are federal holidays that lands on a weekday. The remaining 21 weekdays are countable as business days for invoicing, SLA windows, and contract math.

May 1999 contains no US federal holidays that fall on a weekday. Banks, the Federal Reserve, and US capital markets keep their normal schedule throughout the month. The full quarter has no US federal closures, which is unusual; staff vacation requests cluster around state and personal days instead.

May 1998 also had 21 business days, so the working capacity is unchanged year over year. The shift is driven by where weekends and federal holidays fall on the calendar in each year, not by any change in the number of holidays themselves. May 1999 starts on a Saturday and May 1998 started on a Friday, which determines how many of each weekday land in-month.

Two things shift the monthly count. First, the day of the week the first of the month lands on changes the count of each weekday: a 31-day month starting on a Friday produces five Fridays, five Saturdays, and five Sundays, while one starting on a Monday produces five Mondays, five Tuesdays, and five Wednesdays. Second, federal holidays anchored to a fixed date (Independence Day, Veterans Day, Christmas Day) shift their weekday across years; some years the holiday lands on a weekend and the observance moves to the adjacent Friday or Monday, which keeps the business-day count steady but changes which weekday is excluded.

Use the country selector in the calculator above, or visit the dedicated country pages for the United Kingdom, Canada, Australia, India, the Philippines, France, Germany, Japan, Mexico, or Singapore. Each calculator excludes that country's national public holidays. The country comparison table further down this page shows the May 1999 business-day count under each of the eleven supported holiday calendars side by side.