Casper, WY.A number of Wyoming Post Offices along the area of totality will also offer unique, special postmarks to commemorate the August 21st Total Solar Eclipse.

These Post Offices include: Alcova, Casper, Bondurant, Douglas, Ft. Washakie, Glendo, Glenrock, Jay Em, Lander, Mills, Lusk, Powder Riverton, Shoshoni, Thermopolis, Wheatland and others.

The United States Postal Service says the special postmark will include the city, date of the Eclipse, the time and duration of the totality, and the latitude and longitude of the city.

The postmark will be available starting on Monday and will be available for 30 days.

Any item bearing current First-Class postage stamps will be postmarked at no charge, according to the U.S. Postal Service.