Minn. Stat. § 645.13: TIME; PUBLICATION FOR SUCCESSIVE WEEKS.

When the term "successive weeks" is used in any law providing for the publishing of notices, the word "weeks" shall be construed as calendar weeks. The publication upon any day of such weeks shall be sufficient publication for that week, but at least five days shall elapse between each publication. At least the number of weeks specified in "successive weeks" shall elapse between the first publication and the day for the happening of the event for which the publication is made.