How accurate are the lunar phase calculations?

The calculations use a deterministic trigonometric approximation of the 29.53-day synodic month to provide highly reliable lunar data.

Can I check the moon phase for a date in the past or future?

Yes, by using the `get_lunar_phase` tool, you can provide any date in YYYY-MM-DD format to calculate the lunar state for that specific time.

What information is returned for a specific date?

You will receive the moon's age in days, the current phase name, the illumination percentage, and the days remaining until the next Full and New Moon.

Moon Phase Calculator MCP Connector for Claude

A+

Calculate precise lunar phases, illumination, and moon age for any date.

3 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides deterministic lunar phase calculations. Use get_lunar_phase to retrieve the moon's age, current phase name, illumination percentage, and the number of days until the next Full or New Moon for any specific date. You can also use get_phase_sequence to see the order of lunar phases or get_illumination_thresholds to understand how phases are categorized.

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