Eclipse & Conjunction Calendar
Make an astronomy calendar of eclipses, Moon phases and planetary alignments. Search events and check their dates.
How can I make a calendar of astronomical events?
Select a UTC date range and event types to calculate eclipse peaks, lunar phases, equinoxes, solstices and planetary conjunctions or oppositions. Local solar eclipses include contact times for your observer. Search and filter the event list, inspect circumstances, then export the visible events as CSV or an ICS calendar. Planetary conjunctions here are alignments with the Sun.
Put the sky on your calendar.
Choose a place and time. Explore what happens overhead.
Enter times as UTC, for example 2026-10-01T00:00:00Z. Display zone uses names such as America/Toronto. Latitude is positive north; longitude is positive east.
Your chart and event list will appear here.
Three simple steps
How to use Eclipse & Conjunction Calendar
Choose an observer location, UTC time range and display time zone.
Calculate, explore the results and inspect event details.
Save your settings and download a calendar or data report.
Common questions
Good to know
Understand the result.
Keep the original.
Is this tool free, and are my files uploaded?
This tool is free with no account required. The work happens in your browser. Your input and files are not sent to a processing server.
What are the limits and details?
Calculations run locally in a cancellable browser worker. Terrain, clouds and weather are not modelled. Times use UTC inputs and your chosen IANA zone for display. Save a project file to keep your settings.
Dates 1900–2100; at most five years per calculation. Global eclipse peaks do not establish local visibility. This calendar includes Sun–planet alignments, not every planet-to-planet conjunction.