Shopify » Date and Time

A Shopify Date and Time field always stores the date and time in ISO 8601 format without a presumed timezone (YYYY-MM-DDThh:mm:ss+00:00) Note that ACF doesn't allow for selection of seconds in the time part of the field - this will always be '00'. A field of type Shopify » Date and Time can be subject to date filters in Liquid:

{{ product.metafields.accentuate.published_date_time.value | date: format: 'long' }}

Please see Understanding Date Formats in Liquid and Shopify