If you were born in Canada, there’s a good chance your birthday clumps up with a whole swarm of other Canadians. This chart ranks every calendar date from 1 (most common) to 366 (least common) using 30 years of birth data. The result: a surprisingly lopsided birthday calendar, with a few lonely dates sitting almost empty. Let’s zoom in on the weird spikes and dead zones.
Why the pattern looks like this
Most Canadian births arrive about nine months after the dark, cold winter holidays, which helps explain that September surge. Cultural and medical factors also thin out certain days: planned inductions and C‑sections tend to avoid major holidays, pushing December 25, December 26, and January 1 into the “birthday desert” zone. When you line it all up on one grid, you can literally see policy, preferences, and weather etched into the Canadian calendar.
What the chart instantly reveals
- The biggest birthday crowds land in mid‑September, especially September 9–20, where many dates rank in the top 10.
- Summer is peak baby season overall, with July, August and September packed with low rank numbers (more births).
- The rarest birthday is December 25, sitting at rank 366 in bright orange, with December 24 and January 1 also way down the list.
- Late October and early November are relatively quiet compared to the fall baby boom before and after.
- February 29 isn’t shown here, but every non–leap day in February is still less common than the fall dates next to them.
Real‑world takeaways from Canada’s birthday map
Hospitals across Canada can expect their maternity wards to be busiest in late summer and early fall, especially around September 9–20.
Retailers planning birthday or back‑to‑school promos in Canada can time their biggest pushes for August and September when the most birthdays cluster.
Insurance companies and banks can use Canada’s clear birthday seasonality to better time customer campaigns, like RESP or child‑related offers, around high‑birth months.
Creative Variations
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