Minn. Stat. § 474A.025

All applications, notices, and other materials required to be filed or submitted to the department pursuant to this chapter must be received by the department no later than 4:30 p.m. on the deadline day or date. When an application, notice, or other required material is required to be filed or submitted to the department on or before a prescribed day or date and the prescribed day or date falls on a Saturday, Sunday, or legal holiday, it is timely filed or submitted if it is received by the department by 4:30 p.m. on the next succeeding day which is not a Saturday, Sunday, or legal holiday.