I've only had an Intro. to Astronomy course about 20 years ago, but I'm pretty sure the the way you've listed the equinox dates for the southern hemishere isn't quite right.

Google knows all:

Vernal Equinox: The sun is on the equator moving north, and marks the beginning of spring, (in the southern hemisphere this is the beginning of autumn).

I'd list it like this:

Northern Hemisphere:
Spring, March 21 (Vernal Equinox)
Summer, June 22 (Summer Solstice)
Autumn, September 22 (Autumnal Equinox)
Winter, December 22 (Winter Solstice)

Southern Hemisphere:
Autumn, March 21 (Vernal Equinox)
Winter, June 22 (Winter Solstice)
Spring, September 22 (Autumnal Equinox)
Summer, December 22 (Summer Solstice)

Cheers,

Brent

-- Yeah, I'm a Delt.

In reply to Re^2: Is there a module for determining dates of Astronomical Seasons? by dorko
in thread Is there a module for determining dates of Astronomical Seasons? by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.