Special care may be taken to avoid occurrences or reminders of the number 4 during everyday life, especially during festive holidays, or when a family member is ill. So much so that just mentioning the number 4 around a sick relative is strongly avoided. For instance, you never want to give four of something and there is even a saying that "you don’t do things in fours…". Elevators in Asia and Asian neighborhoods will often be missing the 4th floor or any floor whose number contains the digit "4" (as 14, 24, etc.). Military aircraft and ships will also avoid the number 4 (such as the South Korean and Taiwanese navies) due to its extreme negative connotations with death. April 4th is also considered an exceptionally unlucky day (much like Friday the 13th in the West).
Similarly, 14, 24, 42, etc. are also to be avoided due to the presence of the digit 4 in these numbers. In these countries, these floor numbers are often skipped in buildings, ranging from hotels to offices to apartments, as well as hospitals. Table number 4, 14, 24, 42, etc. are also often left out in wedding dinners or other social gatherings in these countries.