Question: When did the hotel celebrating Ahwahnee Heritage Days open?

Context paragraphs:
International Cycling Classic: International Cycling Classic, also known as the Point Premium Root Beer or simply SuperWeek, was a 17-race series over 17 days open to licensed amateur and professional cyclists.  The series took place primarily in the area surrounding Milwaukee, Wisconsin.

Floral City Heritage Days: Floral City Heritage Days is an annual celebration in Floral City, Florida.  It takes place the first weekend of December.  It celebrates the area's history including phosphate mining and historic homes.  The event includes a fish fry, horse-drawn carriage rides, luminaries and caroling.  It is hosted by the Floral City Heritage Council.

Floral City, Florida: Floral City is a census-designated place (CDP) in Citrus County, Florida, United States.  The population was 5,216 at the 2010 census.  The community is home to the Floral City Heritage Hall Museum and hosts the Floral City Heritage Days the first weekend in December.  The area has a history of phosphate mining and includes historic homes.

Farnborough Airshow: The Farnborough International Airshow is a week-long event that combines a major trade exhibition for the aerospace and defence industries with a public airshow.  The event is held in mid-July in even-numbered years at Farnborough Airport in Hampshire, United Kingdom.  The first four days (Monday to Thursday) are dedicated exclusively to trade, with the final three days open to the public.

Floral City Heritage Hall Museum: Floral City Heritage Hall Museum is a museum in Floral City, Florida.  It is located in a Fire Station building in downtown Floral City.  The fire station closed in January 2000 and the museum opened on December 4, 2009 for Floral City Heritage Days as the Heritage Museum & Country Store.  It includes two galleries, a library, media center, and store.  Offices, storage and a kitchen were under construction in 2014.  In 2014 its website stated the museum is open Friday and Saturday from 10:00 a.m. to 2:00 p.m. as well as for special events.  The museum is located next to the Community Building and Library on Orange Avenue, one block east of U.S. Highway 41.  It is operated by the Floral City Heritage Council.

Doors Open Days: Doors Open Days or simply open days provide free access to buildings not normally open to the public.  The first Doors Open Day took place in France in 1984, and the concept has spread to other places in Europe (see European Heritage Days), North America, Australia and elsewhere.

Ahwahnee Heritage Days: Ahwahnee Heritage Days is a festival held in Yosemite Valley, in Yosemite National Park, every February or March annually.  The Ahwahnee Hotel celebrates the Roaring Twenties, and the 1930s and 1940s - with music performances, as well as cultural and history events.

Open House London: Open House London is an event which promotes appreciation of architecture by the general public.  It is a part of the organisation Open-City and is best known for its annual Open House Weekend which is a two-day event held on one weekend each September throughout London since 1992.  The event forms a London version of the European Heritage Days ("Journées Européennes du Patrimoine"), a Europe-wide event that started as "Journées Portes ouvertes des monuments historiques" (Historic Monument Open Door Days) in France in 1983.  During the Open House Weekend many buildings considered to be of architectural significance open their doors for free public tours.  Heritage Open Days is a similar event covering the rest of England, and takes place the previous weekend to Open House London.

European Heritage Days: European Heritage Days (EHD) is a joint action of the Council of Europe and the European Commission involving all 50 signatory states of the European Cultural Convention under the motto, "Europe: a common heritage".  The annual programme offers opportunities to visit buildings, monuments and sites, many of which are not normally accessible to the public.  It aims to widen access and foster care for architectural and environmental heritage.  These events are also known as Doors Open Days and Open Doors Days in English-speaking countries.

Ahwahnee Hotel: The Ahwahnee Hotel is a grand hotel in Yosemite National Park, California, on the floor of Yosemite Valley, constructed from steel, stone, concrete, wood and glass, which opened in 1927.  It is a premiere example of National Park Service rustic architecture and was declared a National Historic Landmark in 1987.  The hotel was built by two companies that were merged when the National Park Service began leasing concessions to a single concessionaire in 1925.  The Curry Company, owned by David and Jennie Curry and the Yosemite Park Company, the owners of the Yosemite Lodge, became the new "Yosemite Park & Curry Company" headed by Donald Tressider.  The structure originally served as both a luxury hotel and the company offices of YPC&CC.  Despite financial struggles, the YPC&CC remained the concessioner for the Ahwahnee Hotel until 1993, before the National Park Service required a new concessioner to buy the YPC&CC, creating a new company, Delaware North.  Delaware North's contract ended on March 1, 2016 when The National Park Service selected Aramark as the new concessionaire.

Supporting paragraphs: Ahwahnee Heritage Days Ahwahnee Hotel
Answer: 1927