Today is the 13th day of the month. Many office buildings and hotels do not show a 13th floor even though they have at least this many floors. Do you consider the number 13 to be an unlucky number?

Today is the 13th day of the month.Many office buildings and hotels do not show a 13th floor even though they have at least this many floors.Do you consider the number 13 to be an unlucky number?