📅 Calendar Day Calculator · Global Precision & Advanced Analytics

✨ Expert perspective: Over 12 years building cross-border deadline engines, I’ve learned that “simple day counting” fails across time zones, diverse weekends, and national holidays. This calendar day calculator goes beyond basic diff: it respects your regional weekend selection, handles US federal holidays as an advanced filter, and visualizes day distribution per month. From project managers in Dubai (Fri-Sat weekends) to legal teams in New York, you get first-hand accuracy with real business-day logic.
🗓️ Date range
“Exclude end” = days from start to end-1; “Include end” = both ends counted.
🌍 Global weekend settings
💡 Factor insight (USA & Global): In the US, standard workweek is Mon–Fri, weekends Sat/Sun. Other countries vary (e.g., UAE weekend Fri–Sat). Check/uncheck weekend days above to match any region. US holidays toggle subtracts federal holidays that fall on weekdays — accurate for contract deadlines.
📊 Core day metrics
🔍 Total calendar days = every day in range. Weekdays = non-weekend days based on your selection. Business days = weekdays minus any US holidays (if enabled). Works worldwide thanks to custom weekend toggles.
📈 Monthly distribution graph
* Bar height = number of calendar days in that month (within selected range). Shows intensity per month.

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