The commonest birthdays in Canada

Here's a fun thing, for a change: a graphic of the most common birthdays in Canada, based on data from the last 30 years.

Unsurprisingly, February 29th is the least common followed by dates on or around Christmas and New Year - no-one wants to be in labour on Christmas Day or New Year's Eve, and hospital staff definitely don't want them to be.

The most popular birthday is 20th September, for no good reason that I can see. In fact, 9 of the 10 most popular days are in September.

In broader terms, the summer months (lighter colours on the chart) are the period of the most common birthdays, while the winter months (darker colours) are the least common. And it's a pretty stark dichotomy; the only real exceptions are July 1st and 2nd (Canada Day, go figure!)