The survey went beyond holidays: It also listed the anniversary of a family member’s death (26 percent) and a sibling’s birthday (23 percent). Occasion Percentage of Respondents Against It as a Birthday Christmas (December 25) 40 percent Leap Day (February 29) 38 percent The anniversary of a family member’s death 26 percent New Year’s Day (January 1) 23 percent Any date too close to the holidays 23 percent A sibling’s birthday 23 percent Halloween (October 31) 16 percent