I recommend using it in conjunction with the static Liquid date filter below.
Static liquid filter
Use this in your template to filter posts by current date:
This code captures the current time (at build time) into the
now variable and only activates if the
date of the post is larger (in the future).
date: '%s' captures the date as a timestamp and
plus: 0 ensures that any string values are cast to integers.
Method originally from here.