Entry not saving when date isn't changed using frontend form When editing an entry (actually it's a product within Craft Commerce but everything seems the same) with a pre-existing date, the field looks like this:

&lt;input name="fields[date][date]" value="06/12/2016"&gt;


But when re-saving the entry it won't save if I leave the date the same. I'm not getting any errors. If I change the date and re-save the entry, all is fine. Any ideas?
Something I'd not done with the edit form was replace [new1] with [{{variant.id}}] for the variant inputs. As I said, the form was saving correctly anyway if I changed the date, so I didn't expect correcting these to fix the issue I'd been having.

It turns out that correcting these does in fact fix the issue I was having with saving products with an unchanged custom date field. Here is the corrected template code:

{% if variant is defined %}
  &lt;input type="hidden" name="variants[{{ variant.id }}][unlimitedStock]" value=""&gt;
  &lt;input type="hidden" name="variants[{{ variant.id }}][minQty]" value=""&gt;
  &lt;input type="hidden" name="variants[{{ variant.id }}][maxQty]" value=""&gt;
  &lt;input type="text" value="{{ variant.stock }}" name="variants[{{ variant.id }}][stock]"&gt;
  &lt;input type="text" value="{{ variant.price | number_format(0) }}" name="variants[{{ variant.id }}][price]"&gt;
{% else %}
  &lt;input type="hidden" name="variants[new1][unlimitedStock]" value=""&gt;
  &lt;input type="hidden" name="variants[new1][minQty]" value=""&gt;
  &lt;input type="hidden" name="variants[new1][maxQty]" value=""&gt;
  &lt;input type="text" value="" name="variants[new1][stock]"&gt;
  &lt;input type="text" value="" name="variants[new1][price]"&gt;
{% endif %}


I'm left wondering whether only having a single default variant allowed still permits new variants to be submitted, which might explain why I wasn't getting any errors? Similarly, I'm not sure why correcting the variant field names fixed the problem I was having with the custom date field not saving when the date wasn't changed.