The definition of a business day is from 8 am -5 pm PST (California time), Monday - Friday.
However, the in-house team is also off for the following holidays in 2019:
New Year's Day 01/01/2019
Martin Luther King Jr. Day 01/21/2019
President's Day 02/18/2019
Memorial Day 05/27/2019
Independence Day 07/04/2019
Labor Day 09/02/2019
Thanksgiving Day 11/28/2019
Day after Thanksgiving 11/29/2019
Christmas Eve 12/24/2019
Christmas Day 12/25/2019