Many centuries ago, birthdays were considered a time when the bad spirits were able to harm you. It was believed that you should have your friends and family around you so that their good wishes and present-giving would keep the bad spirits away. People also believed that, by lighting candles, they were sending a signal or wishes to the gods. Later on, candles started to be used on birthday cakes. One story about the beginnings of the birthday cake is that it started with the Greeks, who made round cakes standing for the full moon for their moon goddess . They also placed candles on the cake to make it light, again like the moon. However, the Germans are said to have first used cakes and candles. They used a sweet cake and they put a large candle in the centre of the cake to mean "the light of life". The "Happy Birthday" song is more than a hundred years old. The music was written in 1893 by two sisters, Patty and Mildred Hill, who were schoolteachers in Louisville, Kentucky. The music was first used as a morning greeting to their students with the title, "Good Morning To All". In 1935, the words legally belonged to the Hill sisters, and the copyright has been bought and sold for millions of dollars ever since. The present copyright is owned by Warner Communications. They bought it in 1989 for more than $22 million. When was the music written?
In 1893. In 1913. In 1935. In 1989.