Event Countdown Timer App

Develop a dynamic countdown application that tracks time remaining until important events like holidays, personal milestones, and custom occasions. This app helps users stay aware of upcoming events while providing visual progress indicators and the ability to manage multiple countdowns simultaneously.

What You'll Build:

A responsive countdown timer application featuring pre-built countdowns for major holidays and the ability to create custom event timers. The app will display time remaining in multiple formats and provide visual progress bars and notification features for important events.

Key User Stories:

• As a user, I want to see countdowns for major holidays like Christmas and New Year so that I can track important seasonal events
• As a user, I want to create custom countdowns for personal events like birthdays and anniversaries so that I can track meaningful dates
• As a user, I want to see time remaining in days, hours, minutes, and seconds so that I can understand exactly how much time is left
• As a user, I want visual progress indicators showing how much time has passed so that I can see event proximity at a glance
• As a user, I want to organize my countdowns by categories so that I can manage different types of events efficiently
• As a user, I want to receive notifications when events are approaching so that I can prepare accordingly

Technical Implementation:

Use JavaScript Date objects and setInterval for real-time countdown updates. Implement local storage for saving custom events and user preferences. Create responsive CSS animations for visual appeal and use the Notification API for browser alerts. Consider using a simple state management pattern for handling multiple active countdowns.