Khmer Calendar - ប្រតិទិនខ្មែរ

Khmer Calendar (ប្រតិទិនខ្មែរ) is a modern, privacy-focused calendar designed to organize your schedule while celebrating Cambodian heritage. It integrates solar and traditional Khmer lunar systems, running 100% offline with zero ads.

📅 Khmer Lunar Engine (1800–2200)
• 400-Year Accuracy: Solar-to-lunar conversion spanning 1800 to 2200.
• Lunar Phases: Waxing (Khneurt), waning (Roach), leap months (Adhikamasa), and leap days (Chhantreathikavare).
• Moha Sangkran Arrival: Verified arrival times from TVK broadcasts & decrees (1997, 2009, 2010–2026 unbroken) with authentic Khmer time periods, plus estimates for other years.
• Era & Animal Shifts: Animal year changes at Moha Sangkran (Leang Sak); Buddhist Era transitions on 1st waning day of Visak.

🌸 Holy Days (Thngai Seil) & Shaving Days
• Never Miss a Holy Day: Automatically tracks holy days on 8th & 15th waxing, and 8th & 14th/15th waning.
• Shaving Days (Thngai Kaor): Indicators shown on the day before each holy day.
• Lotus Icons: Elegant markers on the calendar grid with customizable visibility.

🏛️ Official Holidays & Cultural Heritage
• Verified Public Holidays: Official holiday calendars (2016–2027) cited from government sub-decrees.
• Cultural Traditions: Khmer New Year, Pchum Ben, Water Festival, Royal Ploughing, Meak Bochea, Visak Bochea.
• Anniversary Counts: Auto-calculated in Khmer (ខួបលើកទី៤៧) and English (47th).
• Bilingual Knowledge: Tap "Learn More" on catalog events for curated cultural summaries.

🔮 Astrology & Zodiac (Western & Chinese Ganzhi)
• Western Big 3: Sun, Moon, and Rising signs with elements, ruling bodies, and traits.
• Offline Rising Sign: Database of Cambodian communes/districts/provinces and global cities—no GPS or internet needed.
• Chinese Ganzhi (干支): Four Pillars (Year, Month, Day, Hour) with clash animals and Chinese festival tracking (1900–2100).
• Detail Popups & AI Query: Sign artwork and insights, with an optional shortcut to explore with AI in your browser.

⏰ Personal Events & Precision Reminders
• Local Event Storage: Add appointments and notes stored securely in local SQLite.
• Smart Repeating Rules: Repeat every X days, weekly, monthly, or yearly with leap-day rules.
• Exact Alarms: Powered by Android Exact Alarm for reliable alerts with minimal battery use.
• Flexible Alerts: Daily reminder time plus optional repeating alerts (every 2, 4, 6, 8, or 12 hours).
• Dual Time Zones: Switch between local device time and Cambodia Standard Time (UTC+7).

📱 5 Home Screen Widgets
• Month Widget (4×3): Interactive calendar grid with lunar dates, holy days, and direct date opening.
• Productivity Widget (4×2): Prominent date card with lunar details, Buddhist Era, zodiac, and agendas.
• Focus Widget (4×2): Daily events overview with scrollable agenda and quick previews.
• Planner Widget (4×2): Resizable 29-day rolling agenda with week dividers and event chips.
• Glance Widget (4×1 / 2×1): Compact date, lunar details, animal year, Sak, and badges.
• Live Theme Sync: Follows app theme, accent color, font scale (80%–200%), and filters.

🎨 Material 3 UI & Personalization
• Themes & Accents: Light mode, OLED Dark mode, and 5 color palettes (Blue, Lavender, Rose, Amber, Lime).
• Traditional Weekday Colors: Authentic Cambodian colors for each day of the week.
• Font Scaling: Adjust app font size (80%–150%) and widget font size (80%–200%).
• Adaptive Layout: Optimized for phones (portrait/landscape) and tablets (two-column view).
• Bilingual Interface: Instant toggle between Khmer and English.

🔒 100% Private, Offline & Open Source
• Zero Internet Permission: No network access requested—your data never leaves your device.
• Ad-Free & Tracker-Free: Zero advertisements, analytics, or third-party tracking SDKs.
• Local Data: Events and settings stay strictly on your local device.
• Open Source: Free, transparent, and open under the Apache 2.0 license.