There are situations where you want to display a number of days until particular date or to display some content before or after the date has passed.

Here is a short HUBL macro that will do this for you:

HubSpot HubL
{#
Prints out a number of days until the specified date
@target_date: Date as "DD/MM/YY" (format output of a date picker field in HubSpot)
#}

{% macro days_until_date(target_date)  %}
  {% set date_parts = target_date|split("/") %}
  {% set year = date_parts[2]|int + 2000 %}
  {% set month = date_parts[1] %}
  {% set day = date_parts[0] %}
  {% set date_interim_format = year ~ "-" ~ month ~ "-" ~ day ~ "T00:00:00+0000" %}
  {% set date_object = date_interim_format|strtotime("yyyy-MM-dd'T'HH:mm:ssZ") %}
  {{ date_object|between_times(local_dt, "days") }}
{% endmacro %}

{#
Usage Examples 
#}

{% set custom_date = "22/04/29" %}

There are {{ days_until_date(custom_date)|trim }} days before the {{ custom_date }}

{% set days_until = days_until_date(custom_date)|trim %}

{% if days_until > 0 %}
  Date has passed!
{% endif %}

{#
Notes:
* Don't forget to "trim" the macro output, so as to get rid of the spaces!
* Macro will print a negative number before the specified date
* Macro will print a positive number after the specified date
#}