From the U.S. Postal Service announcement on November 17, 2020:
From the USPS: Merging traditional artwork with modern design touches, this stamp depicts one of many stories about Raven, a figure of great significance to the Indigenous peoples of the Northwest Coast. Among the cultures of the region, Raven plays an essential role in many traditional tales, including stories about the creation of the world. Inspired by the traditional story of Raven setting free the sun, the moon and the stars, Tlingit/Athabascan artist Rico Worl depicts Raven just as he escapes from his human family and begins to transform back into his bird form. Antonio Alcalá served as art director.
This stamp will be issued July 30th with a ceremony in Juneau, Alaska.
The Scott catalogue number is 5620.
Additional information will be posted below the line, with the most recent at the top.
Updated July 7th:
[ceremony information]
U.S. Postal Service Honors Raven Story with Stamp
Tlingit Artist Designed Stamp To Be Unveiled in Alaska
WHAT: The U.S. Postal Service will unveil the Raven Story Forever Stamp at the Sealaska Heritage Institute in Juneau, AK.
Merging traditional artwork with modern design touches, this stamp depicts one of many stories about Raven, a figure of great significance to the Indigenous people of the northern Northwest Coast, part of the area that ranges from Southeast Alaska through coastal British Columbia and south into Washington state.
News of the stamp is being shared with the hashtags #RavenStoryStamp and #NativeAmericanRavenStory.
The Raven Story stamps can be preordered at USPS.com.
The story behind the stamp will also be featured on the U.S. Postal Service Facebook and Twitter pages, posting at 5 p.m. ET on July 30, 2021. A pictorial postmark of the designated first-day-of-issue city, Juneau, is available at usps.com/shopstamps.
WHO: Jakki Krage Strako, U.S. Postal Service chief commerce and business solutions officer and executive vice president
Rosita Worl, president, Sealaska Heritage Institute
Rico Worl, stamp artist
WHEN: Friday, July 30, 2021, at 11 a.m. AKDT
WHERE:
Sealaska Heritage Institute
105 S. Seward St.
Juneau, AK 99801
BACKGROUND: The stamp was created by Tlingit/Athabascan artist Rico Worl. The stamp design depicts a raven just as he escapes from his human family and begins to transform back into his bird form. To create the stamp art, Worl used formline, the traditional design style of the Indigenous people of the northern Northwest Coast. The art director is Antonio Alcalá.
Among the cultures of the region, the raven plays an essential role in many traditional tales, including stories about the creation of the world. The stamp is inspired by the traditional story of the raven setting the sun, moon and stars free.
The Raven Story stamps are being issued as a Forever stamp in panes of 20. These Forever stamps will always be equal in value to the current First-Class Mail 1 ounce price.
Updated June 17th:
Here are the first-day postmarks for this issue: 
The Digital Color Postmark measures 2.55″ x 1.45″ 
The pictorial postmark measures 2.36″ x 1.14″
Updated June 17th from the Postal Bulletin:
On July 30, 2021, in Juneau, AK, the United States Postal Service® will issue the Raven Story stamp (Forever® priced at the First-Class Mail® rate) in one design, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 478000). This stamp will go on sale nationwide July 30, 2021, and must not be sold or canceled before the first-day-of-issue.
Merging traditional artwork with modern design touches, this stamp depicts one of many stories about Raven, a figure of great significance to the Indigenous people of the northern Northwest Coast, part of the area that ranges from Southeast Alaska through coastal British Columbia and south into Washington state. Among the cultures of the region, the raven plays an essential role in many traditional tales, including stories about the creation of the world. Inspired by the traditional story of Raven setting free the sun, the moon, and the stars, Tlingit/Athabascan artist Rico Worl depicts Raven just as he escapes from his human family and begins to transform back into his bird form. To create the stamp art, Worl used formline, the traditional design style of the Indigenous people of the northern Northwest Coast. Antonio Alcalá served as art director.
No automatic distribution.
How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at usps.com/shop. They must affix the stamps to envelopes
of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:
FDOI – Raven Story Stamp
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900
After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by November 30, 2021.
Technical Specifications:
Issue: Raven Story Stamp
Item Number: 478000
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 20 (1 design)
Series: N/A
Issue Date & City: July 30, 2021, Juneau, AK 99801
Art Director: Antonio Alcalá, Alexandria, VA
Designer: Antonio Alcalá, Alexandria, VA
Artist:: Rico Worl, Juneau, AK
Modeler: Sandra Lane / Michelle Finn
Manufacturing Process: Flexographic, Foil Stamping, Microprint
Printer: Banknote Corporation of America
Press Type: Gallus RCS
Stamps per Pane: 20
Print Quantity: 18,000,000 stamps
Paper Type: Phosphor, Block Tag
Adhesive Type: Pressure-sensitive
Colors: Black, Grey PMS 429, Kurz Luxor 220 Gold
Stamp Orientation: Horizontal
Image Area (w x h): 1.42 x 0.84 in. / 36.068 x 21.336 mm
Overall Size (w x h): 1.56 x 0.98 in. / 39.624 x 24.892 mm
Full Pane Size (w x h): 7.24 x 6.23 in. / 183.896 x 158.242 mm
Press Sheets Size (w x h): 12.71 x 21.71 in. / 322.834 X 551.4334 mm
Plate Size: 120 stamps per revolution
Plate Numbers: “B” followed by two (2) single digits in bottom two corners
Marginal Markings:
Front: Header: Raven Story • Plate number in bottom two corners
Back: ©2020 USPS • USPS logo • 2 barcodes (478000) • Plate position diagram (6) • Promotional text
From the USPS: These stamps pay tribute to heritage breeds, preindustrial farm animals that are enjoying renewed attention for their versatility, adaptability and unique genetic traits. This pane of 20 stamps includes photographs of 10 heritage breeds: the American Mammoth Jackstock donkey, the Narragansett turkey, the Cayuga duck, the San Clemente Island goat, the Mulefoot hog, the Cotton Patch goose, the American Cream draft horse, the Barbados Blackbelly sheep, the Milking Devon cow and the Wyandotte chicken. Zack Bryant designed the stamps with photographs by Aliza Eliazarov. Greg Breeding served as art director.
Just a guess: The Accocreek Post Office may not have the staff or experience to handle a first-day.
From the USPS: The Postal Service features a brush rabbit (Sylvilagus bachmani) on this beautiful new additional-ounce stamp, available on a pane of 20 or in a coil of 100. The pencil-and-watercolor illustration is from preexisting artwork by designer and illustrator Dugald Stermer. The brush rabbit is a small brownish cottontail rabbit of the U.S. West Coast and Baja California, Mexico. Art director Ethel Kessler designed the stamp.
Brush Rabbit stamp (Non-denominated Additional Ounce Rate) in one design, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 121100) and a PSA coil of 100 stamps (Item 740300). This stamp will go on sale nationwide January 24, 2021, and must not be sold or canceled before the first-day-of-issue.
From the USPS: In recent decades, Day of the Dead has caught on in the United States as a festive and increasingly popular celebration for all ages. These new stamps will be the first issued by the U.S. Postal Service to mark this holiday. Luis Fitch designed and illustrated the stamps. Antonio Alcalá was the art director.
From the USPS: These stamps capture many of the games Americans play for outdoor fun. A pane of 16 stamps features eight unique designs including: badminton, bocce, cornhole, croquet, flying disc, horseshoes, tetherball and a variation on pick-up baseball. Greg Breeding was the art director. Mike Ryan designed the stamps with original artwork by Mick Wiggins.
From the USPS: Four new postcard stamps celebrate the beauty and history of American barns. With differing qualities of light and color, each piece reflects one of the four seasons: a round barn surrounded by the hazy light and warm colors of fall, a gambrel-roofed barn in summer, a forebay barn in an early spring countryside, and a Western barn on a winter’s night. Ashley Walton designed the stamps with original artwork by Kim Johnson. Greg Breeding was the art director.
created digital paintings of four types of iconic barns found in the rural American landscape. With differing qualities of light and color, each piece reflects one of the four seasons:
From the USPS: The Colorado hairstreak graces the eighth nonmachinable butterfly stamp for use on irregularly sized envelopes, such as square greeting cards, invitations or announcements. The stamp art is a highly stylized, simplified image of a Colorado hairstreak (Hypaurotis crysalus). Artist Tom Engeman created the stamp art. Art director Derry Noyes designed the stamp.
rate) in one design, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 121200). This stamp will go on sale nationwide March 9, 2021, and must not be sold or canceled before the first-day-of-issue.
From the USPS: The new Mystery Message stamp will put your sleuthing skills to the test. Featuring bright colors and interesting shapes, the stamp design is a visual riddle spelling out a message. Each colorful square contains a letter in an interesting pattern. The patterns, though seemingly random, were carefully placed so that when put all together, the message reads, “MORE THAN MEETS THE EYE!” Art director Antonio Alcalá designed the stamp.
From the USPS: Garden Beauty celebrates America’s love of flowers and gardens with 10 new stamp designs in a booklet of 20. The stamps include a pink flowering dogwood; a rose-pink and white tulip; an allium, or ornamental onion; a pink and white Asiatic lily; a magenta dahlia; a yellow and pink American lotus; a pink moth orchid with mottled petals; a pink and white sacred lotus; an orange and yellow tulip; and a yellow moth orchid with a pink center. Art director Ethel Kessler designed the stamps with existing photographs by Allen Rokach.
5558 Pink Flowering Dogwood
The Digital Color Postmark measures 2.96″ x 1.47″ 
The pictorial postmark measures 2.59″ x 1.22″. The previously announced “killerbar” (“FIRST DAY OF ISSUE”) hand cancel is also available.
Colors: Cyan, Magenta, Yellow, Black
From the USPS: Chien-Shiung Wu (1912-1997) was one of the most influential nuclear physicists of the 20th century. During a career that spanned more than 40 years in a field dominated by men, she established herself as the authority on conducting precise and accurate research to test fundamental theories of physics. Art Director Ethel Kessler designed the stamp with original art by Kam Mak.
most influential nuclear physicists of the 20th century, with a commemorative Forever stamp.
The Digital Color Postmark measures 2.91″ x 1.50″ 
The B&W pictorial postmark measures 2.73″ x .78″ 
The special postmark, for use by other post offices, measures 2.49″ x 1.00
