Whenever a specific date is not given to begin circulation of nomination papers, the first day for circulation shall be the first day of the month one month prior to the month in which the filing deadline is scheduled. Signatures shall not be counted if signed and dated prior to the first day for circulation.
Wis. Stat. § 8.02
Nomination paper circulation date
Official source: Wisconsin State Legislature. Reproduced from public-domain Wisconsin statutes; confirm against the official source for the current text. Not legal advice.