Equinox and Solstice Calculator

Calculate the approximate dates of vernal equinox, summer solstice, autumnal equinox, and winter solstice for any year between 1 and 3000.

How to Use Equinox and Solstice Calculator

Enter a year between 1 and 3000 and click Calculate. The tool uses the Meeus algorithm to compute approximate dates and times (UTC) for all four equinoxes and solstices in that year.

Step-by-Step Instructions

  1. Enter the year you want to calculate for
  2. Click Calculate to compute the dates
  3. View the four equinox and solstice dates with approximate times
  4. Copy the results for reference

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