Easily calculate planetary hours based on your local sunrise and sunset times. A precise, free astrology tool for tracking daily planetary influences.
AI Generation Prompt
Technical Specification: Planetary Hours Calculation Utility
1. Application Overview
A high-performance, single-file, browser-based utility designed to calculate and display the current planetary hour based on the user's local sunrise and sunset times. The tool will use the Chaldean order of planetary rulership and provide a real-time timeline for the current day.
2. Technical Stack & Architecture
- Architecture: Single-file HTML (HTML5, Vanilla CSS3, Vanilla JS).
- External Dependencies:
- SunCalc (via CDN) for accurate sunrise/sunset calculations.
- Tailwind CSS (via CDN) for layout and styling.
- Lucide Icons (via CDN) for visual indicators.
- Constraints Compliance:
- No persistent storage (No
localStorage,sessionStorage, or cookies). - No
alert(),prompt(), orconfirm(). Use custom DOM-based modals. - All logic is calculated in-memory upon valid location input.
- No persistent storage (No
3. UI/UX Design
Visual Aesthetic
- Theme: Clean, bright, professional "SaaS" aesthetic. Light background (
bg-slate-50), crisp typography (Inter or system-sans), and high-contrast borders. - Accents: Use distinct colors for each planetary influence (e.g., Sun/Gold, Moon/Silver-Blue, Mars/Red, etc.) to allow users to quickly scan the timeline.
Layout
- Header: Minimal title and brief instructions.
- Input Section:
- Browser Geolocation API button ("Use My Location").
- Manual override inputs (Latitude/Longitude text fields).
- Date selector (defaults to current date).
- Dashboard/Results:
- Current active planetary hour card (prominent display).
- Full timeline view (accordion or list format) showing all 24 hours (12 day, 12 night).
4. Feature List
- Geographic Precision: Automatic detection of latitude/longitude using the browser's Geolocation API.
- Real-Time Updates: The current planetary hour is highlighted dynamically without page refreshes.
- Timeline Visualization: A vertical timeline view for both day and night hours, clearly indicating sunrise and sunset markers.
- Informational Tooltips: Hover or click interactions to explain the traditional significance of each planetary ruler.
- Print-Friendly View: A clean CSS print media query to allow users to print their daily planetary schedule.
5. Development Directives
- State Management: Keep all application state (lat, lng, date, results) in a single configuration object in JavaScript.
- Animations: Use CSS transitions (
transition-all duration-300) for the timeline expansion and modal visibility. - Responsiveness: Use Tailwind's grid/flexbox utilities to stack the inputs on mobile and expand the timeline view on desktop.
- Performance: Ensure the
suncalccalculation is debounced if the user is manually typing coordinates to prevent excessive re-renders. - Error Handling: If Geolocation is blocked or fails, show a friendly, non-blocking UI message inside the results container rather than an alert popup.
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Frequently Asked Questions
Everything you need to know about using this application.
What are planetary hours in astrology?
Planetary hours are a traditional system of timing that divides the day and night into twelve distinct periods, each ruled by one of the seven classical planets (Saturn, Jupiter, Mars, Sun, Venus, Mercury, and Moon). The cycle repeats throughout the day, beginning at sunrise. By dividing the total daylight hours and nighttime hours by twelve, the system accounts for the seasonal variation in day length. This tool provides an accurate way to determine which planetary energy is dominant at any given moment in your local time zone.
How does this application calculate the hours?
This application uses precise geolocational data to fetch your local sunrise and sunset times. It calculates the total duration of the day (sunrise to sunset) and the night (sunset to next sunrise) and divides those durations into twelve equal parts. The calculation follows the traditional Chaldean order of planetary rulership. This ensures that the results provided are mathematically aligned with your specific latitude and longitude, offering higher accuracy than static tables found in books or generic online charts.
Is this tool mobile-friendly?
Yes, this tool is fully responsive and optimized for all screen sizes, including mobile phones, tablets, and desktop computers. The interface utilizes a clean, modern layout that ensures the planetary schedule is readable on any device without requiring additional downloads. Because this is a browser-based, single-file application, it loads quickly on mobile connections. You can bookmark the page or add it to your home screen for immediate access to your daily planetary timeline whenever you are on the go.
Why does this tool require location access?
Planetary hour calculations are entirely dependent on the specific sunrise and sunset times of your current location. To provide an accurate schedule, the application requires your latitude and longitude to perform the necessary solar calculations. This application processes all calculations locally within your browser. No location data is sent to external servers, stored in databases, or tracked by any third-party services. Your privacy is maintained entirely within your local browser session.
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