San Francisco Ballet performs repertory from January through May at the War Memorial Opera House in San Francisco. In addition, the company performs in July at the Stern Grove Festival in San Francisco, tours nationally in the summer and fall, and presents "Nutcracker" in December at the War Memorial Opera House. In 1991, San Francisco Ballet performed in New York City for the first time in 26 years, returning in 1993, 1995, 1998, 2002, 2006, 2008, and 2013. Following the initial tour, "The New York Times" proclaimed, "Mr. Tomasson has accomplished the unprecedented: He has pulled a so-called regional company into the national ranks, and he has done so by honing the dancers into a classical style of astonishing verve and purity. San Francisco Ballet under Helgi Tomasson's leadership is one of the spectacular success stories of the arts in America." In May 1995, San Francisco Ballet hosted 12 ballet companies from around the world for UNited We Dance: An International Festival. The festival commemorated the 50th anniversary of the signing of the United Nations Charter, which took place at the San Francisco War Memorial and Performing Arts Center. In fall 2008, as part of the company's 75th anniversary celebration, San Francisco Ballet embarked on a critically acclaimed four-city American tour with engagements at Chicago's Harris Theater for Music and Dance, New York City Center, Southern California's Segerstrom Center for the Arts, and the John F. Kennedy Center for the Performing Arts in Washington, D.C. The year culminated in a New Works Festival of world premieres by 10 of the dance world's most acclaimed choreographers—Julia Adam, Val Caniparoli, Jorma Elo, Margaret Jenkins, James Kudelka, Mark Morris, Yuri Possokhov, Paul Taylor, Stanton Welch, and Christopher Wheeldon. Other anniversary initiatives included a commemorative book, "San Francisco Ballet at Seventy-Five", and the broadcast of Tomasson's "Nutcracker" in December 2008 on the "Great Performances: Dance in America" series on PBS, produced in partnership with KQED Public Television in San Francisco. San Francisco Ballet also performed in frequent overseas tours, including engagements at prestigious venues such as the famed Opéra de Paris-Palais Garnier in Paris (1994, 2001); London's Sadler's Wells Theatre (1999, 2004, 2012) and Royal Opera House in Covent Garden (2002); Athens' Megaron Theatre (2002) and Herod Atticus Amphitheatre (2004); Copenhagen's Tivoli Gardens (1998, 2010); and the Edinburgh International Festival at the Edinburgh Playhouse (1997, 2003).