The second most popular birth month in the United States is August.
While December is the most popular month for births, August comes in a close second. This is likely due to a number of factors, including the timing of conception, the weather, and the availability of healthcare resources.
For instance, many couples conceive during the holiday season, leading to a surge in births in August. Additionally, the warmer weather in August may encourage more couples to try for a baby.
It's important to note that birth month popularity can vary slightly depending on the region and year.