Looks like most people were conceived during winter.
Love this! April being the lowest concentration of births every year since 2009 is fascinating. Now to figure out the reason why Indian folks don’t be f*ckin in July…
Quite interesting to see!
How does this trend compare to worldwide birthrates per month? Accounting for differences in average birthrate, of course.
marriage season is nov and dec and hence baby season from aug sep
wind the thing back nine months and you get an “Indians in heat” heat map
This is probably the same for most countries. Someone should post the US version of this which I expect to be more or less the same. In most cultures November December is the holiday season where people are not thinking about work as much.
Why are we just looking at a scale between ~6-10%? When are the remaining 90% of births??
Even if it were fractions, it would not add up.
Data can be misleading, so check your scales.
It would be interesting to see a similar comparison of birth timing in other generally hot countries. I suspect seasonal weather plays an outsized role here vs. culture.
Did they pause recording births during the first month of COVID? Even for April, 2020 is a significant change from previous years.
In 2009, people in India celebrated Valentine’s Day
You can deffo tell how they were passing the time during the first months of the pandemic 😉
So a very skinny bell curve distribution on the expected dead average of 8.33
Do they fuck more at Christmas?
Fun fact, the September birth trend is actually an unexplainable global phenomenon. North and Southern hemisphere alike, across all different climate areas, Even in cultures that don’t celebrate year end holidays all have more births in September for some reason.
So April 2020 was the beginning of the pandemic, but in July 2019 there was no apparent issue. Is it possible that this chart records hospital deliveries and during the first lock down many babies were delivered at home? (Please don’t make a joke about deliveries during the pandemic 🤣🤣)
I don’t know how it works in other parts of India, in my state, July is “aashada”, for newly weds this means the girl has to go back to her parent’s house. Most plausible reason I’ve heard is “since it’s the harvesting season, the men should be busy ploughing in the field instead of ploughing his wife lol. It’s also common have kids as soon as one gets married (I believe it’s common throughout our country). The data will definitely be skewed since most population in our country is rural, linked to farming.
I always thought distribution is roughly correlated with school years – children born at the beginning of a school year outperform academically, so it’s an additional incentive for couples to time it
Based on this chart, I just realised my brother and I were conceived on birthdays. Wonderful.
Looked up what happened in India in July 2019 (9 months before the blue April 2020). Population Control Bill introduced and triple talaq banned. Correlation isn’t always causation but thought that was interesting.
Now plot against this the weather nine months prior, so that we can see the correlation.
I’m proud of the fact that all three of my kids have birthdays that fall within a three week span. One birthday party FTW!
![[OC] Seasonality of births in India](https://www.europesays.com/wp-content/uploads/2025/06/jidipv4mkb6f1-1806x1024.png)
22 comments
What do Indians have against April births?
This is so cool.
Does this have to do with the weather or culture?
Looks like most people were conceived during winter.
Love this! April being the lowest concentration of births every year since 2009 is fascinating. Now to figure out the reason why Indian folks don’t be f*ckin in July…
Quite interesting to see!
How does this trend compare to worldwide birthrates per month? Accounting for differences in average birthrate, of course.
marriage season is nov and dec and hence baby season from aug sep
wind the thing back nine months and you get an “Indians in heat” heat map
This is probably the same for most countries. Someone should post the US version of this which I expect to be more or less the same. In most cultures November December is the holiday season where people are not thinking about work as much.
Why are we just looking at a scale between ~6-10%? When are the remaining 90% of births??
Even if it were fractions, it would not add up.
Data can be misleading, so check your scales.
It would be interesting to see a similar comparison of birth timing in other generally hot countries. I suspect seasonal weather plays an outsized role here vs. culture.
Did they pause recording births during the first month of COVID? Even for April, 2020 is a significant change from previous years.
In 2009, people in India celebrated Valentine’s Day
You can deffo tell how they were passing the time during the first months of the pandemic 😉
So a very skinny bell curve distribution on the expected dead average of 8.33
Do they fuck more at Christmas?
Fun fact, the September birth trend is actually an unexplainable global phenomenon. North and Southern hemisphere alike, across all different climate areas, Even in cultures that don’t celebrate year end holidays all have more births in September for some reason.
So April 2020 was the beginning of the pandemic, but in July 2019 there was no apparent issue. Is it possible that this chart records hospital deliveries and during the first lock down many babies were delivered at home? (Please don’t make a joke about deliveries during the pandemic 🤣🤣)
I don’t know how it works in other parts of India, in my state, July is “aashada”, for newly weds this means the girl has to go back to her parent’s house. Most plausible reason I’ve heard is “since it’s the harvesting season, the men should be busy ploughing in the field instead of ploughing his wife lol. It’s also common have kids as soon as one gets married (I believe it’s common throughout our country). The data will definitely be skewed since most population in our country is rural, linked to farming.
I always thought distribution is roughly correlated with school years – children born at the beginning of a school year outperform academically, so it’s an additional incentive for couples to time it
Based on this chart, I just realised my brother and I were conceived on birthdays. Wonderful.
Looked up what happened in India in July 2019 (9 months before the blue April 2020). Population Control Bill introduced and triple talaq banned. Correlation isn’t always causation but thought that was interesting.
Now plot against this the weather nine months prior, so that we can see the correlation.
I’m proud of the fact that all three of my kids have birthdays that fall within a three week span. One birthday party FTW!
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