Perigean spring tide Perigean spring tide A proxigean spring tide (also known as a perigean spring tide) is a tide that occurs three or four times per year when the Moon's perigee (its closest point to Earth during its 29.5-day elliptical orbit) coincides with a spring tide (when the Earth, Sun and Moon are nearly aligned every two weeks). This tide usually adds only a couple of inches to normal spring tides. The Moon's orbit around Earth is elliptical, which causes the Moon to be closer to Earth and farther away at different times. The Moon and the Sun are aligned every two
Full moon in the sky.) Thus, there is no long period of darkness between sunset and moonrise for several days after the full moon, thus lengthening the time in the evening when there is enough light for men to see to work to get the harvest in. The "Maine Farmers' Almanac" from c. the 1930s began to publish Native American "Indian" full moon names. The "Farmers' Almanac" (since 1955 published in Maine, but not the same publication as the "Maine Farmers' Almanac") continues to do so. An early list of "Indian month names" was published in 1918 by Daniel Carter Beard in