12 CFR § 192.8
Computation of time
November 10, 2020
In computing the period of days, the OCC excludes the day of the act or event (e.g., the date an application is received by the OCC) from when the period begins to run. When the last day of a time period is a Saturday, Sunday, or Federal holiday, the time period runs until the end of the next day that is not a Saturday, Sunday, or Federal holiday.