N.J. Stat. § 19:11-1: Day for filing documents or performing official duties falling on Sunday or legal holiday

Should the day for the filing of any petition, declination, resignation, instrument in writing or other paper or document required to be filed in any office under the provisions of this title, or for the performance of any duty required by this title by any person, candidate or official, fall upon the first day of the week, commonly called Sunday, or any legal holiday, such filing or performance of duty shall be effected upon the next following business day.