Freemarker "date" to Unix timestamp?

Thank you, DolanH!

Unfortunately, this isn't working for me, as the ?long only works on a number, and the date I'm working with appears to just be a string. 

Here's the error, in case you're curious:

For "?long" left-hand operand: Expected a number, but this has evaluated to a string (wrapper: f.t.SimpleScalar): ==> user.registrationTime [in template "Hitbox" at line 6, column 53]

I'll keep working on this!

CarolineS

First, you need to convert it to date format then ?long will work. See here https://prnt.sc/j371fr

${datesupport.parseAsIso8601(user.registration_time)?long}

Thank you very much, VikasB! I hadn't found the datesupport library in my searches - how very helpful!

Unfortunately, though, I can't get it to work.

${datesupport.parseAsIso8601(user.registrationTime)}

gives me 

<div style="font-style: italic; font-weight: lighter; color: darkGrey; background-color: Beige; padding: 10px;" class="lia-widget-not-found">
	This widget could not be displayed.
</div>

Note that

${user.registrationTime}

DOES work to give me the user's registration time (sample result: Tue Mar 20 14:31:45 PDT 2018)

Do I need to do something special to enable datesupport?

Thanks!

Ok, so user.registrationTime gives me a string formatted like this: "Wed Jun 14 15:37:14 PDT 2017" - which is not ISO format (example ISO format: 2017-06-14T15:37:14-07:00).

How can I turn the string that user.registrationTime gives me into ISO format (or just directly into milliseconds since the epoch...)