</term>
<listitem>
<para>
- The date on which the user account will be disabled. The date is
- specified in the format <emphasis remap='I'>YYYY-MM-DD</emphasis>.
+ Sets the date on which the user account will be disabled.
+ The value can be specified as a date in the YYYY-MM-DD format
+ or as a number of days since 1970-01-01.
+ The date is interpreted using the UTC timezone.
</para>
<para>
- If not specified, <command>useradd</command> will use the
+ If not specified, <command>useradd</command> uses the
default expiry date specified by the <option>EXPIRE</option>
variable in <filename>/etc/default/useradd</filename>, or
an empty string (no expiry) by default.