DayNumber.Now

DayNumber.Now - Your Daily Calendar Companion

DayNumber.Now is a sophisticated web application that provides real-time tracking of day numbers, week numbers, and comprehensive date information. The tool calculates the current day of the year (1-365/366), ISO week numbers, and displays various date formats including ISO 8601, RFC 2822, and Unix epoch timestamps.

Key Features

• Real-time Day Number Tracking: Shows exactly which day of the year it is with automatic leap year handling
• ISO Week Number Calculation: Displays ISO 8601 standard week numbers with proper year boundary handling
• Multi-timezone Support: Supports over 15 timezones with automatic detection and manual selection
• Date Calculators: Includes day number calculator, week number calculator, days between dates calculator, and days from today calculator
• Embeddable Widgets: Free widgets for websites that display day numbers and week numbers
• Export Capabilities: Download calendar images and export data to CSV for documentation
• Holiday Integration: Shows upcoming holidays based on detected country

Technical Implementation

• Built with Next.js framework
• Uses date-fns utilities for accurate date calculations
• Timezone-aware calculations with automatic browser detection
• Schema.org structured data for SEO optimization
• Responsive design with light/dark theme support

Target Users

• Project Managers: For tracking project milestones using day numbers
• Development Teams: For sprint planning and coordination using ISO week numbers
• Finance Departments: For payroll cycles and fiscal deadline tracking
• Event Planners: For countdown calculations and scheduling
• Content Creators: For embeddable date widgets on websites and blogs

The tool automatically handles leap years, daylight saving time transitions, and provides accurate date calculations across different timezones, making it ideal for distributed teams and international projects.