March 18th, 2010; adición de la prima -- "March 20th, 2010; 1:32 in the afternoon: Landman rejoices."

Astronomically, the vernal equinox (usually 20 March in the Northern Hemisphere, and 22 September in the Southern Hemisphere), should be the middle of spring (based on the angle of the sun and insolation) and the summer solistice (usually 21 June in the Northern Hemisphere and 21 December in the Southern Hemisphere) should be mid-summer (because the sun is at its highest) but daytime temperatures lag behind insolation by several weeks because the earth and sea have thermal latency and take time to warm up. Some cultures, such as those who devised the Celtic and East Asian calendars, call the spring equinox mid-spring, but others (especially in the USA and sometimes in England) regard it as the "first day of spring". For most temperate regions, signs of spring appear long before the middle of March, but the folklore of 21 March being the "first day of spring" persists, and 21 June as the "first day of summer" is common in the USA. In South Africa, Australia and New Zealand, spring begins on 1 September, and has no relation to the vernal equinox.


(source: wikipedia.org)


***

Artist's note: don't be fooled, you're getting three for one here, and you already got one before. It's nice out. Bonustime.