An Elegant Evening was created in 1985.
Both are correct; however, the more concise and therefore more elegant usage is "by evening."
There are many different places, both physical and virtual, to find a nice elegant evening dress, but I find the site I will link you to below to my liking. http://www.simplydresses.com/
Una serata elegante is an Italian equivalent of the English phrase "an elegant evening." The feminine singular phrase also translates as "one elegant evening" in English. The pronunciation will be "OO-na sey-RA-ta EY-ley-GAN-tey" in Pisan Italian.
Elegant Pitta was created in 1836.
Elegant Angel was created in 1990.
Elegant Spreadwing was created in 1862.
Elegant Trogon was created in 1834.
The Elegant Universe was created in 1999.
Elegant Woodcreeper was created in 1868.
Duke Elegant was created in 1999.
Elegant Gypsy was created in 1977.
Definitley! Black is a very elegant colour, you could also where a silver or pearl necklace with it :)