“Swan Lake” premiered in 1877 with a libretto of uncertain authorship, a score by neophyte ballet composer Peter Ilyich Tchaikovsky, and choreography, now lost, by the now forgotten Julius Reisinger.

Minimal sun protection required for normal activity. Wear sunglasses on bright days. If outside for more than one hour, cover up and use sunscreen. Reflection off snow can nearly double UV strength, ...