What this calendar calls a business day
A weekday that is not on the holiday list you are using.
ReadGuides
Business days, weekends, sources for the 2026 lists, and the April overlap.
Weekends you can switch
Saturday and Sunday are the default, not a law of the tool.
ReadWhere the 2026 dates come from
What was copied into the page, and what was left out on purpose.
ReadHow to read the month
Green, blue, clay, and grey mean different closures.
ReadCSV and a calendar file
What the download contains.
ReadWorked example: United States and England, April 2026
Inputs, the count, and the two UK-only days.
ReadStart with the worked example if you want the inputs and the result without using the tool.