# Node property validation function for date formatting

**URL:** <https://discourse.nodered.org/t/node-property-validation-function-for-date-formatting/20457>\
**Category:** Developing Nodes\
**Created:** [16 January 2020 14:27 UTC](https://discourse.nodered.org/t/node-property-validation-function-for-date-formatting/20457 "2020-01-16T14:27:17Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![johnwalicki](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/johnwalicki/32/8848_2.png) [@johnwalicki](https://discourse.nodered.org/u/johnwalicki)\
**Post date:** [16 January 2020 14:27 UTC](https://discourse.nodered.org/t/node-property-validation-function-for-date-formatting/20457/1 "2020-01-16T14:27:17Z")

</div>

I am creating a new Node-RED node that requires a date using a yyyymmdd format. Has anyone created a node that implements a property validation function on date formatting? I want to filter out or rewrite "yyyy-mm-dd" or "yyyy/mm/dd" as yyyymmdd

All I have now is:

```auto
    defaults: {
        date: { value:0, validate:RED.validators.number(), required:true},
    },

```

I give a hint in the input

```auto
  <div class="form-row">
   <label for="node-input-date"><i class="fa fa-calendar"></i> Select Date</label>
    <input type="text" id="node-input-date" placeholder="yyyymmdd">
  </div>

```

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