Indiana Code Title 13. Environment § 13-15-6-7

Sec. 7. (a) In computing a period of time under this chapter, the day of the act, event, or default from which the designated period of time begins to run is not included.  The last day of the computed period is to be included unless it is a:

(b) A period runs until the end of the next day after a day described in subsections (a)(1) through (a)(4).

(c) A period of time under this chapter that commences when a person is served with a paper or electronic notice commences with respect to a particular person on the earliest of:

(d) If a notice is served through the United States mail or electronically, three (3) days must be added to a period that commences upon service of that notice.