Calendar subscriptions

Add moon phases, planet retrogrades and public holidays to Google Calendar, Apple Calendar or Outlook. They update automatically.

Moon phases

New moon, first quarter, full moon and last quarter dates.

Planet retrogrades

When Mercury, Venus, Mars and the outer planets turn retrograde and direct (NASA JPL Horizons).

Public holidays

National holidays and observances for a country.

How to use

Follow these steps to get a result

  1. Choose a calendar and tap Google Calendar, or Apple / Outlook.

  2. Confirm the subscription in your calendar app.

  3. Events appear and refresh on their own; delete the subscription any time.

Features

What this tool includes

  • Moon phase dates for the next three years

  • Planet retrogrades from NASA JPL Horizons data

  • Public holidays for six countries

  • Works with Google, Apple and Outlook calendars

FAQ

Common questions about this tool

Tap the Google Calendar button, then confirm the subscription. For other apps, copy the link and use “Add calendar from URL”.

Time zone rules come from the IANA time zone database; daylight saving changes are applied automatically. Methodology · Data sources