Countdown between business hours and excluding weekends and holidays

[seritpt]

Hi :-)

I would like some help and to know if it's possible to have a countdown only between business hours and excluding weekends and holidays.
Imagine for the SLA system my team has home hours to support their clients but only between business hours.
I've already developed a way to return the correct date and time (see).
Now I need to connect that information to Countdown.
For example, I have 16 hours to support my client, I need to exclude weekends and holidays and only count in business hours.
I believe that this countdown needs to have 16 hours in mind but only in business hours. That means that it must be paused outside business hours, weekends and holidays.

Thanks in advance.