7 Tex. Admin. Code § 55.5 - Computation of Time
The calculation of any time period measured in days by Finance Code Chapters 157 or 180, or this chapter, is made using calendar days, unless clearly stated otherwise. In computing a period of calendar days, the first day is excluded and the last day is included. If the last day of any period is a Saturday, Sunday, or legal holiday, the period is extended to include the next day that is not a Saturday, Sunday, or legal holiday, unless clearly stated otherwise.
Notes
State regulations are updated quarterly; we currently have two versions available. Below is a comparison between our most recent version and the prior quarterly release. More comparison features will be added as we have more versions to compare.