Is there way to convert date into timestamp with smarty

Question

I need to calculate a date based on a membership but this has to done with timestamp to have a common numeric value. We've read almost the whole smarty.net documentation and couldn't find our solution.

This would have been our best trick:

{capture assign="end_date"}{latestcurrentmembership.end_date}{/capture}{$fin = $end_date|strtotime}

but either capture assign and strtotime seem to be working within CiviCRM. Any idea?

EDIT 1: capture assign works well, it's strtotime that seems to not work within CiviCRM

Answer 1

{capture assign="end_date"}{latestcurrentmembership.end_date}{/capture}

// convert it to strtotime
{assign var='end_date' value=$end_date|strtotime}

or 

{assign var='end_date' value=$end_date|date_format:"%s"}

// display in date format 
{$end_date|date_format:'%Y%m%d'}

HTH

Pradeep

Answer 2

answer came later on:

{latestcurrentmembership.end_date-31536000|date_format:'%Y%m%d'}

I only add to subtract one year in seconds