To give a example, we have members living in Canada, Middle East countries, etc. Phone numbers, addreses, zip&#x2F;postal codes are unlike those typical here in the US, so these are plain text fields in the data entry form.<p>If there&#x27;s an entry mistake and database fields contain the wrong info, it&#x27;s not a tragedy, we&#x27;ll find out sooner or later and it can be corrected.<p>Of course, date entries by necessity can&#x27;t be as &quot;free-form&quot;.  For one thing, browsers can be picky about <i>their</i> preferred format for type=&quot;date&quot; inputs, accepting &quot;&#x2F;&quot; separator, but not &quot;-&quot;.  Requiring a year to be 4 digits between 1980 and current year doesn&#x27;t seem too onerous.<p>These might seem obvious, but complaints about such constraints still come up. It just needs to be clear to users that certain data needs be entered in specific format for good reasons.  I agree with your comments about street addresses, phone numbers, or personal names which need to be unstructured input (but handled securely). .<p>I thought by now this stuff would be appreciated as pretty basic to the developer&#x27;s craft, but apparently it still isn&#x27;t widely enough taught or known.