Adrian Klaver <adrian.klaver@aklaver.com> writes:
> On 4/10/24 12:38, Adnan Dautovic wrote:
>> By the way, the row count of pg_timezone_names is 385, but I do
>> not know how that compares to a more standard installation.
> On my instance of Postgres 16.2, 1196.
You're probably using a build with --with-system-tzdata pointing
at a system tzdata tree that includes leap-second-aware zones.
These tend to have duplicative entries like "America/New_York"
and "posix/America/New_York". (There's also a subtree like
"right/America/New_York", but we reject those because we don't
do leap seconds.) The real number of distinct zones in a
standard tzdata file set these days is a shade under 600.
regards, tom lane