Day — unisex name

What the Data Says About Day

The Social Security Administration has registered 161 babies named Day between 1942 and 2022, spanning 81 consecutive years of U.S. birth records. As a girl's name, Day currently falls outside the top 1,000 girls' names for 2022. The name reached its historical peak in 1973, when 12 babies received it in a single year. Day is classified as unisex in SSA records: the opposite-sex variant accounts for 136 additional births since 1915.

Decade-level aggregation shows that Day performed strongest in the 1970s, accumulating 74 births during that ten-year window. Across the 8 decades of recorded activity, Day shows a clear decline from its mid-century high.

No etymological entry is currently available for Day in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 161 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.