ConstZipWriterConstructorOptions#extendedTimestamp is enabled by default and preserves the
original value, so this reason only appears when no extra field is left to carry it: when it and
ZipWriterConstructorOptions#ntfsTimestamp are both disabled, and also when the date falls outside
the range an extended timestamp can hold, 1901-12-13 to 2038-01-19, and ntfsTimestamp alone is disabled.
Warning reason: the last modification date is outside the range the MS-DOS field can hold, i.e. before 1980 or after 2107, and no extra field carries the original value, so the date written is the nearest bound (see ZipWriter#warnings and EntryMetaData#lastModDate)