How to Calculate Lunar Calendar
What is Lunar Calendar?
A lunar calendar calculator determines the moon's phase on any date using the 29.53-day synodic cycle. Moon phases affect tides, some wildlife, and many cultural and religious calendars.
Formula
Step-by-Step Guide
- 1Reference new moon: 6 January 2000
- 2Days elapsed since reference mod 29.53 = phase day
- 3Illumination = (1 − cos(2π × phase/29.53)) / 2 × 100%
- 48 named phases divide the cycle
Worked Examples
Frequently Asked Questions
What is Lunar Calendar?
A lunar calendar calculator determines the moon\. Use this calculator for accurate, instant results.
How accurate is the Lunar Calendar calculator?
The calculator uses the standard published formula for lunar calendar. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.
What units does the Lunar Calendar calculator use?
This calculator works with inches, percentages. You can enter values in the units shown — the calculator handles all conversions internally.
What formula does the Lunar Calendar calculator use?
The core formula is: Days elapsed since reference mod 29.53 = phase day. Each step in the calculation is shown so you can verify the result manually.
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