Below are the most popular birthdays in the United States. Compiled for 1973 to 2009

Rank Month Day
364 January 1
362 January 2
356 January 3
350 January 4
338 January 5
301 January 6
324 January 7
347 January 8
351 January 9
349 January 10
341 January 11
306 January 12
316 January 13
260 January 14
304 January 15
322 January 16
337 January 17
317 January 18
302 January 19
240 January 20
279 January 21
271 January 22
294 January 23
333 January 24
299 January 25
298 January 26
262 January 27
280 January 28
285 January 29
314 January 30
343 January 31
330 February 1
253 February 2
256 February 3
281 February 4
287 February 5
293 February 6
332 February 7
308 February 8
245 February 9
171 February 10
214 February 11
166 February 12
331 February 13
103 February 14
248 February 15
244 February 16
232 February 17
237 February 18
246 February 19
206 February 20
292 February 21
218 February 22
213 February 23
157 February 24
204 February 25
203 February 26
247 February 27
250 February 28
366 February 29
235 March 1
189 March 2
133 March 3
150 March 4
156 March 5
228 March 6
290 March 7
265 March 8
268 March 9
195 March 10
163 March 11
165 March 12
334 March 13
300 March 14
264 March 15
208 March 16
134 March 17
152 March 18
198 March 19
202 March 20
254 March 21
261 March 22
255 March 23
210 March 24
162 March 25
187 March 26
225 March 27
297 March 28
275 March 29
267 March 30
227 March 31
348 April 1
193 April 2
278 April 3
277 April 4
336 April 5
286 April 6
226 April 7
196 April 8
274 April 9
296 April 10
335 April 11
315 April 12
346 April 13
257 April 14
223 April 15
243 April 16
309 April 17
323 April 18
339 April 19
310 April 20
259 April 21
201 April 22
230 April 23
307 April 24
325 April 25
327 April 26
313 April 27
270 April 28
282 April 29
288 April 30
242 May 1
305 May 2
329 May 3
291 May 4
177 May 5
181 May 6
229 May 7
276 May 8
326 May 9
273 May 10
251 May 11
175 May 12
249 May 13
174 May 14
183 May 15
272 May 16
258 May 17
188 May 18
168 May 19
123 May 20
138 May 21
141 May 22
176 May 23
167 May 24
311 May 25
289 May 26
211 May 27
200 May 28
234 May 29
328 May 30
319 May 31
153 June 1
121 June 2
124 June 3
146 June 4
179 June 5
197 June 6
215 June 7
191 June 8
154 June 9
120 June 10
137 June 11
170 June 12
303 June 13
169 June 14
139 June 15
117 June 16
107 June 17
126 June 18
140 June 19
132 June 20
145 June 21
118 June 22
110 June 23
95 June 24
100 June 25
112 June 26
129 June 27
108 June 28
101 June 29
75 June 30
50 July 1
47 July 2
127 July 3
361 July 4
321 July 5
76 July 6
14 July 7
12 July 8
37 July 9
49 July 10
90 July 11
93 July 12
99 July 13
43 July 14
25 July 15
40 July 16
61 July 17
91 July 18
87 July 19
51 July 20
45 July 21
18 July 22
32 July 23
72 July 24
78 July 25
80 July 26
58 July 27
35 July 28
28 July 29
39 July 30
68 July 31
86 August 1
85 August 2
66 August 3
48 August 4
36 August 5
46 August 6
60 August 7
64 August 8
77 August 9
52 August 10
56 August 11
17 August 12
67 August 13
55 August 14
71 August 15
70 August 16
54 August 17
33 August 18
30 August 19
31 August 20
57 August 21
82 August 22
81 August 23
63 August 24
59 August 25
38 August 26
34 August 27
44 August 28
74 August 29
73 August 30
65 August 31
106 September 1
114 September 2
92 September 3
98 September 4
125 September 5
111 September 6
105 September 7
29 September 8
2 September 9
9 September 10
24 September 11
41 September 12
69 September 13
16 September 14
8 September 15
1 September 16
4 September 17
10 September 18
13 September 19
15 September 20
7 September 21
5 September 22
3 September 23
6 September 24
11 September 25
27 September 26
21 September 27
23 September 28
22 September 29
19 September 30
20 October 1
53 October 2
88 October 3
89 October 4
79 October 5
83 October 6
84 October 7
97 October 8
119 October 9
122 October 10
160 October 11
136 October 12
180 October 13
116 October 14
109 October 15
155 October 16
216 October 17
239 October 18
219 October 19
159 October 20
135 October 21
164 October 22
212 October 23
269 October 24
209 October 25
184 October 26
172 October 27
142 October 28
173 October 29
252 October 30
355 October 31
233 November 1
222 November 2
178 November 3
131 November 4
143 November 5
207 November 6
236 November 7
241 November 8
192 November 9
182 November 10
158 November 11
194 November 12
312 November 13
263 November 14
238 November 15
190 November 16
161 November 17
148 November 18
147 November 19
151 November 20
199 November 21
340 November 22
344 November 23
352 November 24
353 November 25
357 November 26
358 November 27
359 November 28
345 November 29
231 November 30
149 December 1
144 December 2
186 December 3
283 December 4
320 December 5
318 December 6
284 December 7
221 December 8
217 December 9
205 December 10
295 December 11
266 December 12
342 December 13
185 December 14
128 December 15
102 December 16
94 December 17
96 December 18
113 December 19
104 December 20
115 December 21
224 December 22
354 December 23
363 December 24
365 December 25
360 December 26
130 December 27
62 December 28
42 December 29
26 December 30
220 December 31

Data source: NYTimes.com, Amitabh Chandra, Harvard University