archive_entry_mtime(3) on FreeBSD
The text ebdedde9f93c, as FreeBSD 14.0-RELEASE, FreeBSD 13.3-RELEASE, FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE, FreeBSD 12.4-RELEASE, FreeBSD 12.3-RELEASE, FreeBSD 12.2-RELEASE, FreeBSD 11.4-RELEASE shipped it.
functions for manipulating times in archive entry descriptions