Mont. Code Ann. § 1-1-306
The time in which any act provided by law is to be done is computed by excluding the first day and including the last unless the last day is a holiday, and then it is also excluded.
History: En. Sec. 430, p. 130, Bannack Stat.; amd. Sec. 501, p. 233, L. 1867; re-en. Sec. 578, p. 153, Cod. Stat. 1871; re-en. Sec. 519, p. 176, L. 1877; re-en. Sec. 519, 1st Div. Rev. Stat. 1879; re-en. Sec. 536, 1st Div. Comp. Stat. 1887; amd. Sec. 3459, C. Civ. Proc. 1895; re-en. Sec. 8067, Rev. C. 1907; re-en. Sec. 10707, R.C.M. 1921; Cal. C. Civ. Proc. Sec. 12; re-en. Sec. 10707, R.C.M. 1935; R.C.M. 1947, 90-407.