For people born just around midnight, especially around new years eve, a few seconds could impact their DOB by a whole year. This could affect everything from university applications to boating licenses to social security.
Some countries have boating license laws that are different depending on whether your DOB year is >= 1980, as an example for this type of "grandfathering cutoff".
> This could affect everything from university applications to boating licenses to social security.
Last time I looked, a boating license required you to be a certain age. Dec 31 and Jan 1 are still just as far apart as July 6 and July 7.