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As absentminded as you may be, one holiday you’ll always remember is your birthday. On the other hand, the date of your conception is probably the one day you try desperately to forget.

Many believe that these dates are completely random—a one in 365 chance for every person. But as it turns out, the day you were conceived is likely not as arbitrary as you may think.

Using the most recent 2010 census data, the genealogy experts at MooseRoots crunched the numbers to identify the most popular holidays to—ahem—start a family.

#16. April Fool’s Day

Number conceived per 1K people: 3.08
Percent conceived on this holiday compared to average -14.6%

#15. Labor Day

Number conceived per 1K people: 2.57
Percent conceived on this holiday compared to average -6.3%

#14. Presidents Day

Number conceived per 1K people: 2.58
Percent conceived on this holiday compared to average 2.58%

#13. Mardi Gras

Number conceived per 1K people: 2.58
Percent conceived on this holiday compared to average -5.7%

#12. Valentine’s Day

Number conceived per 1K people: 2.59
Percent conceived on this holiday compared to average -5.4%

#11. Easter

Number conceived per 1K people: 2.64
Percent conceived on this holiday compared to average -3.6%

#10. Halloween

Number conceived per 1K people: 2.66
Percent conceived on this holiday compared to average -2.9%

#9. Independence Day

Number conceived per 1K people: 2.71
Percent conceived on this holiday compared to average -0.9%

#8. Father’s Day

Number conceived per 1K people: 2.72
Percent conceived on this holiday compared to average -0.9%

#7. Thanksgiving

Number conceived per 1K people: 2.77
Percent conceived on this holiday compared to average 1%

#6. Mother’s Day

Number conceived per 1K people: 2.77
Percent conceived on this holiday compared to average 1.3%

#5. Christmas Day

Number conceived per 1K people: 2.79
Percent conceived on this holiday compared to average 1.8%

#4. St. Patrick’s Day

Number conceived per 1K people: 2.92
Percent conceived on this holiday compared to average 6.6%

#3. New Year’s Eve

Number conceived per 1K people: 3.05
Percent conceived on this holiday compared to average 11.2%

#2. Cinco De Mayo

Number conceived per 1K people: 3.2
Percent conceived on this holiday compared to average 16.6%

#1. Memorial Day

Number conceived per 1K people: 3.31
Percent conceived on this holiday compared to average 20.8%