» RELATED: Touch new stamp and presto, total solar eclipse becomes moon
The Postal Service notes that thermochromic inks are vulnerable to UV light and advises against leaving your mail out in the sun. They will also be offering special UV-blocking envelopes to help protect the stamp pane for a nominal fee.
The official First-Day-of-Issue ceremony unveiling the stamp will take place on June 20, the start of the summer solstice, at the University of Wyoming’s art museum.
The Aug. 21 eclipse will also mark the first time the phenomenon has occurred from coast-to-coast in nearly 100 years, giving spectators in Oregon, Idaho, Wyoming, Nebraska, Kansas, Missouri, Illinois, Kentucky, Tennessee, North Carolina, Georgia and South Carolina the chance to get a load of the eclipse in all of its totality.
» RELATED: Rare total solar eclipse visible from America in August
According to NASA, the center-line path of totality — where the moon completely blocks the sun, the earth goes dark and the sun's corona shimmers in the blackened sky — will stretch from Salem, Oregon, to Charleston, South Carolina, and will last up to 2 minutes and 41.6 seconds.