Times Square started hosting other major annual events in the 2000s. Since 2002, the summer solstice has been marked by "Mind over Madness", a mass yoga event involving up to 15,000 people. Tim Tompkins, a co-founder of the event, said part of its appeal was "finding stillness and calm amid the city rush on the longest day of the year". Architect Mark Foster Gage proposed and designed the original Times Square Valentine's Day heart in 2009. Since then, designing the heart has become an annual competition.