November 27 is the rarest November birthday in these U.S. records from 1994 through 2014. It ranks #359 of all 366 birthday dates, where #1 is most common. Its low total includes several Thanksgiving-related dates; November 27 is not Thanksgiving every year.
There were 205,164 recorded births on November 27, or 0.239% of the sample. That is about 1 in 418 recorded births, across 21 actual November 27 dates.
November 27, beside other birthdays
Average recorded births each time a date occurred, 1994 through 2014.
- Commonness rank
- 359 / 366
- Share of recorded births
- 0.239 %
- Recorded births
- 205,164
Bars start at zero. Rank 1 means most common and uses total births across all 366 dates. The bars use births per actual occurrence; February 29 appeared five times, while the other dates appeared 21 times.
Check November 27 and compare with a friend →Which late-November birthdays are rarest?
All seven dates on which Thanksgiving can fall sit at the low end of the November ranking. November 27 has the lowest pooled total. The comparison below includes November 26 and 28, rather than treating the whole holiday week as a single birthday.
| Date | Recorded births | Commonness rank | Birth share |
|---|---|---|---|
| November 22 | 224,885 | 336 | 0.262% |
| November 25 | 210,021 | 357 | 0.245% |
| November 26 | 211,935 | 354 | 0.247% |
| November 27 | 205,164 | 359 | 0.239% |
| November 28 | 212,951 | 353 | 0.248% |
| November 29 | 226,988 | 313 | 0.265% |
The full-period average for November 27 is 9,769.7 births per occurrence. A yearly average can hide the difference between a holiday Thursday, the following Friday and an ordinary November date.
What happens in actual Thanksgiving years?
Thanksgiving is the fourth Thursday in November. In our SSA 2000 through 2014 window, it fell on November 27 in 2003, 2008, 2014. We compared those events with nearby Thursdays in their own years.
The Thanksgiving group had a difference of -42.5%. November 27 was the day after Thanksgiving in 2009, with a difference of -28.1% against nearby Fridays. That second result contains only one event.
| Calendar group | Years | Occurrences | Births per occurrence | Control mean | Difference |
|---|---|---|---|---|---|
| Actual Thanksgiving Day | 2003, 2008, 2014 | 3 | 7,272.3 | 12,642.3 | -42.5% |
| Day after Thanksgiving | 2009 | 1 | 8,750 | 12,176.5 | -28.1% |
| Other years | 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2010, 2011, 2012, 2013 | 11 | 10,874.8 | 10,968.4 | -0.9% |
The remaining 11 years were neither Thanksgiving nor the following day. Their combined difference was -0.9%. Those large holiday shortfalls do not describe every November 27 birthday.
This classification describes the calendar. Daily totals do not tell us whether a particular birth was scheduled, or why it happened on that date.
Does November 27 run low in every year?
No. Against nearby dates with the same weekday, it was lower in 10 of the 15 SSA years and higher in 5. Across all years combined, the difference was -12.0%.
| Year | Weekday | Recorded births | Nearby mean | Difference |
|---|---|---|---|---|
| 2000 | Monday | 12,175 | 11,941.5 | +2.0% |
| 2001 | Tuesday | 13,249 | 12,847 | +3.1% |
| 2002 | Wednesday | 11,544 | 12,496.8 | -7.6% |
| 2003 | Thursday | 7,340 | 12,639.8 | -41.9% |
| 2004 | Saturday | 8,118 | 8,621.5 | -5.8% |
| 2005 | Sunday | 7,197 | 7,419.8 | -3.0% |
| 2006 | Monday | 13,150 | 12,975 | +1.3% |
| 2007 | Tuesday | 14,707 | 14,072 | +4.5% |
| 2008 | Thursday | 7,126 | 13,019.5 | -45.3% |
| 2009 | Friday | 8,750 | 12,176.5 | -28.1% |
| 2010 | Saturday | 7,526 | 8,162.3 | -7.8% |
| 2011 | Sunday | 6,879 | 6,971 | -1.3% |
| 2012 | Tuesday | 13,296 | 12,647.8 | +5.1% |
| 2013 | Wednesday | 11,782 | 12,498.3 | -5.7% |
| 2014 | Thursday | 7,351 | 12,267.5 | -40.1% |
Using only dates seven days away gives -13.6%. Using only dates fourteen days away gives -10.4%. Both comparisons retain the holiday events in the target; holiday-sensitive dates are excluded from controls.
The Thanksgiving study follows the moving holiday across all its possible dates. This page follows November 27, whatever its weekday.
Sources and comparison limits
Ranks and shares use FiveThirtyEight's historical U.S. files: CDC/NCHS 1994 through 1999 plus SSA 2000 through 2014, excluding overlapping years. The annual table and calendar groups use SSA alone. The two source series have different administrative coverage.
Each annual comparison averages eligible same-year dates seven and fourteen days away. Actual and standard observed federal holidays, Christmas Eve, December 26 and the day after Thanksgiving are excluded from controls. The pooled percentage divides summed November 27 births by summed annual control means, then subtracts one.
The date-analysis download contains the exact controls and subgroup years. These records are not current worldwide birth counts or a census of living birthday twins. See the methodology, or look up November 27 in the checker.