Midnight or Noon are easy to track when they happen, and are measurable any time of the year. Sunrise varies, so you'd have to accurately track when the equinoxes are, and then accurately measure when sunrise happens, and then have an accurate clock to keep that time for the other 363 days of the year. We've only reliably been able to do that for a couple of hundred years. The definition of 'day' predates that by centuries.
(By the way: In tropical areas, it's not uncommon for the historic 'day' to start at sunrise. Of course, sunrise varies by at most an hour over the course of a year for many of them.)
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:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||