Static Calendar & Time Utility
A browser-first calendar utility with century-scalable navigation, timezone-aware clocks, range math, and developer-ready export formats. Everything runs locally, and selected dates bookmark automatically using the URL hash.
May 2026
🌸 Spring
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30
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Today16
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31
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June 2026
☀️ Summer
31
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Timezones
Fri, May 15, 2026, 10:12:42
UTC
Range & Date Math
Click one day to begin the range, then a second day to finish it.
Selected date: 2026-05-15
Range size: 0 days
Weeks + days: 0w 0d
Business days: 0
Shift selected date
Developer exports
Date stats
ISO week number: 20
Day of year: 135
Leap year: No
Year progress
37% completeOptions
How to use
Use the calendar grid to navigate across months, click a start and end date to calculate day ranges, and use the timezone selectors for instant local and pinned timestamp comparisons. The page hash updates automatically for sharing a selected date.