-By default, @command{gzip} keeps the original file name and time stamp in
-the compressed file. These are used when decompressing the file with the
-@option{-N} option. This is useful when the compressed file name was
-truncated or when the time stamp was not preserved after a file
-transfer. However, due to limitations in the current @command{gzip} file
-format, fractional seconds are discarded. Also, time stamps must fall
-within the range 1970-01-01 00:00:00 through 2106-02-07 06:28:15
-@abbr{UTC}, and hosts whose operating systems use 32-bit time
-stamps are further restricted to time stamps no later than 2038-01-19
+By default, @command{gzip} keeps the original file name in the
+compressed file. This can be useful when decompressing the file with
+@option{-N} if the compressed file name was truncated after a file
+transfer.
+
+If the original is a regular file, @command{gzip} by default keeps its
+timestamp in the compressed file. This can be useful when
+decompressing the file with @option{-N} if the timestamp was not
+preserved after a file transfer.
+However, due to limitations in the current @command{gzip} file
+format, fractional seconds are discarded. Also, timestamps must fall
+within the range 1970-01-01 00:00:01 through 2106-02-07 06:28:15
+@abbr{UTC}, and hosts whose operating systems use 32-bit timestamps
+are further restricted to timestamps no later than 2038-01-19