You can format a date in microflow using the formatDate function. For example,
This will turn the date into a big string of numbers: 20090828133408.
By the way, formatting and parsing are opposites. Parsing converts text into a structured value (e.g. date time) and formatting converts a structured value into text. So, I think you meant 'format' in your question.
You can use the
formateDateTime function call in microflow expressions for this. Please have a look at the Java SimpleDateFormat syntax for the correct notation.