What function can I use on the field and form rules to set a date on description field if I add x business days to current date?

What function can I use on the field and form rules to set a date on description field if I add x business days to current date?

I need to add a date information on the ticket description field. This date is calculated by adding x days to the current date. We have set Holidays on SDP and we want to include that in the calculation of dates. Is there an SDP function available that allows me to calculate dates and use the holidays data we currently have on SDP?

Example:

Current Date = 2/4/2018 (Monday)

Add 10 calendar days to current date = 2/14/2018 (Wednesday)
Add 10 business days to current date = 2/16/2018 (Friday)
Add 10 business days to current date (exclude holiday like February 14) = 2/19/2018 (Monday)

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