Bulgaria vs Portugal: Peak birth month
Bulgaria
9
in 2021
Portugal
9
in 2023
Bulgaria rank
3rd
Portugal rank
3rd
Peak birth month over time
- Bulgaria
- Portugal
How they compare
Bulgaria currently reports 9 against 9 in Portugal, a difference of 0.
The two have swapped places 24 times across 89 shared years of data; in 1905 it was Portugal ahead.
Bulgaria ranks 3rd and Portugal ranks 3rd of 40 countries.
Across the 13 decades both report, Bulgaria averaged higher in 4 and Portugal in 8.
Head to head by decade
| Decade | Bulgaria | Portugal | Difference | Ahead |
|---|---|---|---|---|
| 1900s | 1 | 4 | 3 | Portugal |
| 1910s | 2 | 12 | 10 | Portugal |
| 1920s | 2 | 2 | 0 | — |
| 1930s | 5 | 1.67 | 3.33 | Bulgaria |
| 1940s | 5.2 | 1.9 | 3.3 | Bulgaria |
| 1950s | 2.6 | 2.1 | 0.5 | Bulgaria |
| 1960s | 3.6 | 4.1 | 0.5 | Portugal |
| 1970s | 4.7 | 7 | 2.3 | Portugal |
| 1980s | 6.5 | 5.5 | 1 | Bulgaria |
| 1990s | 6.1 | 7.2 | 1.1 | Portugal |
| 2000s | 7.7 | 8.6 | 0.9 | Portugal |
| 2010s | 7.6 | 9.2 | 1.6 | Portugal |
| 2020s | 8 | 9 | 1 | Portugal |
Averages of every year both report within each decade.
Frequently asked questions
- Which has higher peak birth month, Bulgaria or Portugal?
- Bulgaria, at 9 against 9 in Portugal as of 2021.
- What is the difference in peak birth month between Bulgaria and Portugal?
- 0, with Bulgaria ahead.
- How many years of comparable data are there for Bulgaria and Portugal?
- 89 years are reported by both, from 1905 to 2021.
- How do Bulgaria and Portugal rank globally for peak birth month?
- Bulgaria ranks 3rd and Portugal ranks 3rd of 40 countries.
- Where does this data come from?
- Human Mortality Database (2025) – processed by Our World in Data, published as Peak birth month. Statizoid refreshes it automatically from the source and publishes the full history for both places.
Individual pages
About this data
Number corresponding to the month with the highest daily birth rate.