General The United Post Office will issue a stamp on June 20th, that celebrates the summer solstice in August. I’ll post a picture in answers. Will you buy one just to see what it does? By guest - April 22, 2022 0 100 Share Facebook Twitter Pinterest WhatsApp Linkedin Telegram Email Print “Here it is: According to USPS if you touch stamp it will turn dark.” ANSWERS: That’s pretty cool. I just might have to buy one. ” ” ” ” I’m buying. I’m buying.