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About this app

BibliCal - Moon-Sighting Biblical Calendar

BibliCal is a comprehensive Android app for tracking and managing a moon-sighting-based Biblical calendar system. Whether you follow a Biblical calendar for religious observance, study, or personal interest, BibliCal helps you maintain accurate dates based on actual new moon sightings.

KEY FEATURES

📅 Biblical Date Tracking
• Display today's Biblical date (Month, Day, Year) based on recorded month starts
• Set an anchor date to establish your calendar starting point
• Track months as you confirm new moon sightings

🌙 New Moon Sighting Prompts
• Automatic prompts on days 29/30 to confirm if the new moon was seen
• Record month starts based on actual observations
• Project future months until you confirm actual starts

🌾 Aviv Barley Determination
• Prompt on day 29 of month 12 to determine if barley is aviv
• Helps decide whether the year has 12 or 13 months
• Maintains accurate year calculations

📆 Feast Day Tracking
• Automatically calculates and displays Biblical feast days
• Configurable Firstfruits rule (Fixed Day 16 or Sunday during Unleavened Bread)
• Optional Hanukkah and Purim tracking

📱 Home Screen Widgets
• Three widget options: Date only, Shabbat countdown, or Combined view
• Always see your Biblical date at a glance
• Updates automatically throughout the day

🔔 Notifications
• Optional persistent notification showing today's Biblical date
• Shabbat countdown reminders
• Feast day reminders
• New moon and aviv barley prompts

📤 Calendar Export
• Export Biblical month starts and feast days to your device calendar
• Choose which calendar to export to
• All-day events for easy integration with your existing calendar

⚙️ Customizable Settings
• Month naming mode (Ordinal or Numbered)
• Firstfruits calculation rule
• Notification preferences
• Calendar export options
• Location settings for accurate sunset calculations

HOW IT WORKS

1. Set Your Anchor: Choose a known Biblical date (e.g., "Month 1, Day 1 = today") to establish your calendar starting point.

2. Track New Moons: On days 29/30 of each month, the app prompts you to confirm if the new moon was seen. When confirmed, it records the next month start.

3. Determine the Year: On day 29 of month 12, confirm if barley is aviv to determine whether the year has 12 or 13 months.

4. View Your Calendar: See projected months and feast days in the calendar view, which updates as you confirm actual month starts.

PRIVACY & SECURITY

• Works completely offline - no internet connection required
• Location data used only for local sunset calculations (never transmitted)
• All data stored locally on your device
• No analytics, no tracking, no third-party services
• Optional calendar export requires explicit permission

PERFECT FOR

• Those following a moon-sighting-based Biblical calendar
• Religious observance and study
• Tracking Biblical feast days and observances
• Personal calendar management
• Anyone interested in Biblical timekeeping

Get started today and begin tracking your Biblical calendar with accuracy and ease. BibliCal puts the power of moon-sighting calendar management in your hands.

For support, questions, or feature requests, visit ExperiencingYah.com
Updated on
Jan 2, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

What’s new

Initial Beta Release

Features:
*Live view of the current biblical date
*Calendar view of the full month
*Widgets for current biblical date and countdown to Shabbat
*Persistent notification for current biblical date
*Date estimator if biblical date is unknown
*Prompts to trigger when the new month/year begin
*Export feast days to your calendar

Bonus Features:
*Can toggle Hanukkah and Purim
*Additional view for sunset in Jerusalem

App support

About the developer
Think Transformation, Inc.
drew+ey@thinktransformationinc.com
3225 McLeod Dr Ste 100 Las Vegas, NV 89121-2257 United States
+1 270-551-5042

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