The most and least common dates of the year to be born… are YOU one of the special ones?

If you’ve ever wondered how ordinary your birthday is, look no further.

A heat map shared online shows that more people are born in September and July, while the rarest birthdays are in November, December and January.

September 12, 18, 25, and 26 — all about nine months after the holidays — turned out to be the most common birthdays.

Perhaps unsurprisingly, around Christmas is one of the least likely days to be born, along with New Year’s Day. But some that may shock people are the 4th of July and the end of November.

It is widely believed that the popular September birthdays are due to the cold weather of the previous winter, which caused more people to stay indoors.

September 9 is the most common in this dataset, with September 19 being the second.

After a usual gestation period, many of these babies would theoretically have been conceived on December 17 and 27.

The map also shows that holidays — including Christmas Eve, Christmas Day, New Year’s Day, and July 4 — are the least likely dates of birth.

Most public hospitals in America refuse to schedule cesarean sections on national holidays — except for emergencies — while many private hospitals will arrange fewer.

It has long been thought that some doctors may deliberately induce pregnancy so that delivery occurs on a more convenient day.

The 13th of every month also suffered from a shortage of birthdays. In this case, superstition may be to blame.

The map also shows that holidays – including Christmas Eve, Christmas Day, New Year’s Day and July 4th – are the least likely days for births

Scientists have also determined the best time and months to have sex if you want a baby.

READ MORE: The rarest birthday in the UK revealed

Boxing Day (December 26) has the fewest British births, according to new official figures.

Couples trying to have a baby should have sex before 7:30 a.m. on a spring morning if they want to get pregnant, research suggests.

Scientists at Zurich University Hospital claim that sperm has its own 24-hour internal clock, which is most powerful in the early morning hours.

The Swiss researchers also found that sperm are the healthiest size and shape to fertilize an egg in March, April and May.

Experts analyzed semen samples from 7,068 men aged 25 and 40 who were undergoing fertility treatment.

The samples were cross-checked for sperm concentration, total sperm count, progressive motility, and normal morphology.

Lead author Dr. Brigitte Leeners said: ‘Male sperm quality varies with both circadian and circaannual rhythms.

Collecting sperm in the early morning, where sperm quality was highest, can be used to improve natural fertility.’

However, she added that the findings could also be used to increase the chances of pregnancy through fertility treatments.

Sperm collected in the spring months of March, April and May had the greatest concentration of sperm. Significant decreases were noted in the summer.

While samples collected in the early morning, before 7:30 am, showed the highest concentration levels and normal morphology.