If you are referring to The Hobbit - The Desolation of Smaug, the premiere was held on Monday, December 2nd, 2013.
Mass is held every day of the week. Sunday is the most important day, which may be what you are asking about.
any day you want
Every Memorial Day weekend, the Indianapolis 500is held in Indiana.
Most elections are held on a Tuesday.
Friday
Elections are usually held on a Tuesday.
Bastille Day is always celebrated on July 14, regardless of the day of the week. For 2010, July 14 was on a Wednesday.
Different countries have different approaches to this.
Bullfights are usually held on a Sunday afternoon but may be held any day of the week during special fiestas, holidays and festivals celebrated by certain towns.
Elections are always held on a Sunday in France.
It depends on which country you are in and the legislation of that country.
there is usually a premiere like a week before the movie comes out. Last summer, there was a High School Musical 2 premiere at Disneyland about a week before the movie aired. I went to that. I am also trying to find out the day and the location of the Camp Rock premiere so i will keep you updated on anything that i may find out.