Total births
166
Unisex name · since 1942
Day
Since 1942, U.S. Social Security records show 166 babies named Day, peaking in 1973. See the year-by-year trend, decade totals, and state rankings below, sourced from federal birth data.
- 166
- total births
- 1942–2025
- years on record
- 1970s
- peak decade
- 45%
- born in that decade
Day is not among the current top-ranked girls names; 166 have been recorded since 1942.
Social Security Administration records show Day recorded 166 times among girls since 1942, though it doesn't currently rank among the most-used girls names, peaking in the 1970s. This profile derives year-by-year birth trends, decade totals, and state-level distribution directly from SSA birth-registration files spanning 1942 to 2025.
- 166 total births
- 1942–2025 years on record
- 1970s peak decade
- 45% born in that decade
Data updated Jun 2026
The verdict
166 girls have been named Day since 1942, peaking in the 1970s, last recorded in 2025.
- 166
- total births
- 1942–2025
- years on record
- 1970s
- peak decade
- 45%
- born in that decade
1970s
Peak decade
45% of everyone ever named Day was born in this single decade.
1973
Single peak year
12 babies were named Day in 1973 - its busiest year on record.
Day's usage pattern, beyond the headline number
Splitting Day's full recorded timeline at 1991, 43% of its total births fall in the more recent half of the record versus 57% in the earlier half -- a fairly even split across the full record. Its quietest year on record was 1966, with just 5 recorded births -- worth weighing against the 1973 peak of 12 to see the full range of the name's swing in popularity.
Day at a glance
Last recorded 2025Peak year
1973
Current rank
Unranked
Active since
1942
Day popularity over time - girls
Annual U.S. births registered with the Social Security Administration · 1942–2025
- Peak year (1973)
- 12
- Annual births at peak, across 84 years of records
Day popularity over time - boys
142 total births recorded since 1915 (Day as boys' name)
Day by decade
Total births in each ten-year window, peak vs trough at a glance
1970s was Day's strongest decade.
74 babies received the name during that ten-year window, about 45% of all-time use.
Day births by decade
Total births in each ten-year window
- 1940s 6
1940s
6 births
- 1950s 10
1950s
10 births
- 1960s 5
1960s
5 births
- 1970s
1970s
74 births
- 1990s 5
1990s
5 births
- 2000s 17
2000s
17 births
- 2010s
2010s
31 births
- 2020s 18
2020s
18 births
What this shows Peak: 1970s at 74 births (45% of all-time use).
Frequently Asked Questions
How popular is the name Day? ▼
Since 1942, Social Security records show 166 babies named Day. The most recent recorded year was 2025. Its busiest year on record was 1973, with 12 births.
When was Day most popular? ▼
Day was most popular in the 1970s decade with 74 total births. The single peak year was 1973.
Is Day a unisex name? ▼
Yes, Day is used for both boys and girls. As a girl's name it has 166 births, and as a boy's name it has 142 births.
How long has the name Day been used? ▼
Records for Day go back to 1942, giving 84 years of history through 2025.
What names are similar to Day? ▼
Names with a similar sound or spelling include Dayana, Dayna, Dayanara, Dayanna, and 4 more. These share a common prefix and are also used for girls.
What to do with Day's data
- Day's decade-level peak was the 1970s (74 total births); usage has since declined to 18 in the 2020s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Day
Nearby Names Like Day
Names with a similar sound, spelling, or feel to Day
Dayana Girl
#497 15,598 births
Dayna Girl
#6001 14,460 births
Dayanara Girl
#3422 6,568 births
Dayanna Girl
#1806 3,916 births
Daysha Girl
#3846 2,660 births
Compare Day side by side: Day vs Dayana Day vs Dayna Day vs Dayanara
Related Names
Names with a similar number of total births
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1942–2025 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Day: Baby Name Since 1942 - 166 Births, Peak 1973." NameAlmanac. Accessed via https://namealmanac.com/name/day. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Day draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.