From the U.S. Postal Service announcement on October 22, 2019:
This stamp celebrates the 200th anniversary of Maine statehood. Nicknamed the Pine Tree State, Maine became the 23rd state in the Union on Mar. 15, 1820. American painter Edward Hopper (1882-1967) was among the many prominent artists who sought the tranquility of the state’s coastal towns during the summer. His painting “Sea at Ogunquit” (1914) captures the rugged beauty characteristic of Maine. Art director Derry Noyes designed the stamp.
Issue date: Sunday, March 15th.
The Scott Catalogue number for this issue is 5456.
Additional information will be posted below the line, with the most recent at the top.
Updated April 26th:
Linn’s Stamp News reports the first-day ceremony has been rescheduled for September 27th, at the Augusta Armory. It will again be part of the overall state bicentennial event.
Updated March 13th:
Ceremony postponed!
[press release]
Maine Statehood Stamp Dedication Ceremony Postponed
Stamp will still available for purchase starting Sunday, March 15.
The U.S. Postal Service dedication of the Maine Statehood Forever stamp, scheduled for March 15, 2020, will be delayed due to the postponement of the host event, the Maine Statehood Day Ceremony in Augusta, ME. The Maine Statehood Forever stamp will still be available for purchase starting Sunday, March 15.
The Maine Bicentennial Commission noted that it would reschedule the Statehood celebration for a date when everyone can safely come together to join in observing 200 years of Maine statehood.
The Postal Service will schedule a special dedication for the Maine Statehood Forever stamp at a later date that will likely coincide with the Statehood Day ceremony as planned.
Customers may still purchase the stamps starting Sunday, March 15…
Updated February 24th:
[press release / ceremony details]
U.S. Postal Service to Issue Maine Statehood Forever Stamp March 15
What: The U.S. Postal Service celebrates the 200th anniversary of Maine statehood with a new Forever stamp. Maine became the 23rd state on March 15, 1820.
The picturesque rocky coastline of Maine has long inspired the imagination of writers and artists. American painter Edward Hopper (1882-1967) was among the many prominent artists who sought the tranquility of the state’s coastal towns during the summer. His painting “Sea at Ogunquit” (1914) captures the rugged beauty so characteristic of Maine and is being represented on the stamp, which art director Derry Noyes designed.
The stamp dedication event will be part of the Maine Statehood Day Ceremony activities.
Who: Michael J. Elston, Secretary of the Board of Governors, U.S. Postal Service
Janet Mills, Governor, State of Maine
Matthew Dunlap, Secretary of State, Maine
When: Sunday, March 15, 2020, 1 p.m. EDT
Where: Augusta Armory
179 Western Ave.
Augusta, ME 04330
RSVP: Dedication ceremony attendees are encouraged to RSVP at usps.com/mainestatehood.
Background:
Maine celebrates its bicentennial in 2020, but its history of human habitation dates back some 12,000 years to the earliest Native Americans, who are now part of the Wabanaki Confederacy. During the Colonial period, Maine territory was disputed between Massachusetts Bay Colony and French Acadia, who sought allies among and warred against Native Americans. Following the Revolutionary War and ratification of the U.S. Constitution, the District of Maine remained part of the Commonwealth of Massachusetts. Maine became an independent state on March 15, 1820. Portland, the state’s largest city then and now, served as the capital until 1827 when the seat of government moved to Augusta, a more geographically central location.
Customers may purchase stamps and other philatelic products through The Postal Store at usps.com/shopstamps, by calling 800-STAMP24 (800-782-6724), by mail through USA Philatelic or at Post Office locations nationwide.
Updated February 13, 2020:
This stamp will be issued Sunday, March 15th, in Augusta, Maine. This is a change from what was initially announced.
From the Postal Bulletin:
On March 15, 2020, in Augusta, ME, the United States Postal Service® will issue the Maine Statehood stamp (Forever® priced at the First-Class Mail® rate) in one design, in a pressure-sensitive adhesive pane of 20 stamps (Item 476100). The stamp will go on sale nationwide March 15, 2020, and must not be sold or canceled before the first-day-of-issue.
This stamp celebrates the 200th anniversary of Maine statehood. Nicknamed the Pine Tree State, Maine became the 23rd state in the Union on March 15, 1820. American painter Edward Hopper (1882–1967) was among the many prominent artists who sought the tranquility of the state’s coastal towns during the summer. His painting Sea at Ogunquit (1914) captures the rugged beauty so characteristic of Maine. Art director Derry Noyes designed the stamp.
Availability to Post Offices: Item 476100, Maine Statehood (Forever Priced at the First-Class Mail Rate) Pane of 20 Stamps. Automatic push.
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 – Maine Statehood 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 July 15, 2020.
Technical Specifications:
Issue: Maine Statehood Stamp
Item Number: 476100
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 20 (1 design)
Series: Statehood
Issue Date & City: March 15, 2020, Augusta, ME 04330
Art Director: Derry Noyes, Washington, DC
Designer: Derry Noyes, Washington, DC
Typographer: Derry Noyes, Washington, DC
Existing Art: Edward Hopper
Modeler: Joseph Sheeran
Manufacturing Process: Offset, Microprint
Printer: Ashton Potter (USA) Ltd. (APU)
Press Type: Muller A76
Stamps per Pane: 20
Print Quantity: 20,000,000 stamps
Paper Type: Nonphosphored Type III, Block Tag
Adhesive Type: Pressure-sensitive
Processed at: Ashton Potter (USA) Ltd. (APU)
Stamp Orientation: Horizontal
Image Area (w x h): 1.42 x 0.84 in./36.068 x 21.336 mm
Stamp 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 5.92 in./183.896 x 150.368 mm
Colors: Black, Cyan, Magenta, Yellow
Plate Size: 240 stamps per revolution
Plate Numbers: “P” followed by four (4) single digits in four corners
Marginal Markings: Plate position diagram (6) • 2 Barcodes (476100) • ©2019 USPS • USPS logo
• Promotional text
Here are the first-day postmarks for this issue:
The Digital Color Postmark (DCP) measures 2.76″ x 1.46″ 
The B&W Pictorial Postmark measures 2.64″ x 1.24″
RESORT FEE
Cliff House Maine offers a comprehensive selection of luxury inclusive benefits through a daily fee of just $28 per room, per night. This fee provides relaxing turndown service every evening upon request, fresh coffee, choice of daily newspapers, 24-hour access to the extensive fitness center, easy-access Wi-Fi throughout the resort, daily self-parking, along with enjoying the beautifully manicured lawns, pathways and gardens located throughout our 70-acre resort. Add to this indoor year-round pool, year-round outdoor heated hot tub, outdoor resort pool (ages 13+ June 28 – September 1 ), outdoor family pool (all ages), seasonal live music and access to three fire pits with stunning views overlooking the crashing waves below.
You may not be able to afford a room here, but if you’re interested in ‘just using’ the facilities, here’s a way. Maybe a Hot Jacuzzi after the First Day Ceremony…
Augusta Maine, State Capitol Building probably.
Friday the 13th Came on a Thursday…
From Post Bull FEB 13: They Changed the FDoI to SUNDAY 15 MAR 2020 Shown 2 places in the announcement, and on Both of the DCP & PIC cancells.
Exactly 200 years later. ( 15 MAR 1820 – 15 MAR 2020 )
Nothing in the POST BULL announcement and FDoI ceremonies, as usual. Are there other places in Maine that might have a ceremony, and include a First Day of Sale Postmark? Hopefully the actual DCP won’t have the bottom chopped off of the lettering, as is shown in the Post Bull. The Stamps WILL BE on Automatic distribution.
http://legislature.maine.gov/lio/security-screening/9120
Has the info link for visitors:
=== Visitor Screening ===
Please note that the Maine Capitol Police conduct entry screening of all visitors to the Maine State House,
including students.
To expedite the screening process, please:
Arrive early for your State House Tour – time needed for the screening process will vary.
If possible, start your visit to the State House Complex at the Maine State Museum where you can leave
lunches and bags in the bins provided, or in the museum’s coat room.
Leave bags, unnecessary metal objects, and other personal belongings on the bus or in your car.
Be aware that cell phones, keys, and other personal belongings brought into the State House will be screened by an x-ray machine.
=== Airport Security ===
No, At the State ARMORY, which is adjacent to the Augusta Maine Airport. Fly to Augusta from Boston with Cape Air. 3 Flites a day. https://www.capeair.com Round-trip about $160. Cheaper than renting a car, an no hassel trying to drive to/from Logan airport.
If You live in Maine, you might be able to tune the ceremony in on the local news , Channels 8, 13, 6, Foxx, CNN, and other news stations. All in the atmosphere of a local brewery.
James, do you have a location for the ceremony yet? You say “in the atmosphere of a local brewery.”
( See update Above – Augusta Maine State ARMORY, adjacent to/on the grounds of the Augusta Maine Airport )