Birthday rankings
Which birthday has the most billionaires?
All 366 dates, ranked on what the people born on them actually did. Every list below is computed from the same sourced dataset; nothing is estimated or extrapolated.
Right now the answer is May 27 with 8 sourced billionaires, while June 28 carries the largest combined reported wealth at $813B.
Wealth
Counted from dated, sourced net-worth estimates only.
The richest birthdays
- 1June 28$813B combined wealth
- 2March 26$383B combined wealth
- 3August 21$320B combined wealth
- 4May 14$225B combined wealth
- 5January 12$213B combined wealth
Birthdays with the richest single person
- 1June 28$790B richest person
- 2March 26$334B richest person
- 3August 21$265B richest person
- 4May 14$220B richest person
- 5January 12$205B richest person
Birthdays with the oldest billionaires
- 1October 6102 oldest billionaire
- 2June 1398 oldest billionaire
- 2August 198 oldest billionaire
- 2September 898 oldest billionaire
- 5April 1097 oldest billionaire
Achievement
Founders, laureates, notable-person density and international reach.
Birthdays with the most founders and entrepreneurs
- 1January 130 founders & entrepreneurs
- 2January 719 founders & entrepreneurs
- 2August 1519 founders & entrepreneurs
- 4February 718 founders & entrepreneurs
- 4June 1518 founders & entrepreneurs
Birthdays with the most notable people
- 1January 191 notable people
- 2January 1281 notable people
- 3September 2572 notable people
- 4July 1571 notable people
- 5March 2668 notable people
Birthdays with the most Nobel laureates
- 1February 288 Nobel laureates
- 2May 317 Nobel laureates
- 2June 287 Nobel laureates
- 2October 27 Nobel laureates
- 2October 307 Nobel laureates
Birthdays with people from the most countries
- 1January 146 countries
- 2January 1236 countries
- 3March 1934 countries
- 4July 1533 countries
- 5April 131 countries
By field
Which dates lean scientific, athletic, musical or political.
Birthdays with the most scientists
- 1March 1619 scientists
- 2March 2417 scientists
- 3February 716 scientists
- 4September 2115 scientists
- 4October 3015 scientists
Birthdays with the most athletes
- 1January 1818 athletes
- 2April 1617 athletes
- 2July 517 athletes
- 4February 515 athletes
- 4April 215 athletes
Birthdays with the most actors
- 1September 2523 actors
- 2January 1721 actors
- 3July 120 actors
- 3November 520 actors
- 5January 3119 actors
Birthdays with the most musicians
- 1January 1214 musicians
- 1March 214 musicians
- 1June 2014 musicians
- 1June 2114 musicians
- 1December 2214 musicians
Birthdays with the most authors
- 1January 1225 authors
- 2March 2624 authors
- 3September 2523 authors
- 4February 1622 authors
- 4February 1822 authors
Birthdays with the most politicians and statespeople
- 1January 126 politicians
- 2October 2918 politicians
- 3January 917 politicians
- 3May 317 politicians
- 5June 1615 politicians
Birthdays with the most inventors
- 1May 57 inventors
- 2January 126 inventors
- 2February 266 inventors
- 2March 86 inventors
- 2September 216 inventors
Data asset
The 366 Birthday Billionaire Index
Every date in one sortable table: billionaires, combined wealth, richest person and founders, with methodology and a downloadable CSV.
Open the index →Which birth month has the most billionaires?
Months compared per date, so a 31-day month has no advantage over February. February is averaged over 28.25 days because leap day only comes round every four years.
| # | Month | Billionaires / date | Billionaires | People / date | Founders | Combined wealth |
|---|---|---|---|---|---|---|
| 1 | August | 2.71 | 84 | 48.9 | 341 | $1074B |
| 2 | July | 2.58 | 80 | 49.2 | 321 | $558B |
| 3 | March | 2.52 | 78 | 50.6 | 375 | $1224B |
| 4 | September | 2.50 | 75 | 51.0 | 328 | $759B |
| 5 | June | 2.40 | 72 | 48.2 | 305 | $1600B |
| 6 | October | 2.39 | 74 | 49.1 | 335 | $1233B |
| 7 | May | 2.23 | 69 | 46.5 | 295 | $725B |
| 8 | January | 2.13 | 66 | 51.6 | 362 | $803B |
| 9 | November | 2.07 | 62 | 46.9 | 303 | $421B |
| 10 | February | 2.05 | 58 | 54.3 | 331 | $752B |
| 11 | December | 1.94 | 60 | 45.2 | 292 | $381B |
| 12 | April | 1.90 | 57 | 48.2 | 279 | $511B |
How these rankings are made
Every ranking is recomputed from the dataset each time it is rebuilt (last build 2026-09-28). Counts cover the people on the public page for each date. Wealth uses the low bound of dated estimates from Forbes, Bloomberg, the Sunday Times Rich List, Hurun or filings. Ties share a rank. Dates we have not filled in enough to index still count in the totals, so a date low on a list may simply be one we have covered less. Full methodology.