New York Consolidated Laws, County Law - CNT § 902. Certain office hours

1. The offices of the county clerk in the counties constituting the city of New York shall remain open for the transaction of business from nine o'clock in the forenoon to four o'clock in the afternoon every day except Saturdays, Sundays and holidays and except in the months of July and August when said offices shall remain open for the transaction of business from nine o'clock in the forenoon to two o'clock in the afternoon except Saturdays, Sundays and holidays.

2. Whenever the last day on which any paper shall be filed or act done or performed in any such office expires on Saturday, Sunday, public holiday or a day when such office is closed for the transaction of business, the time therefor is hereby extended to and including the next business day such office is open for the transaction of business.

3. Notwithstanding the foregoing provisions of this section, the motor vehicle section of a county clerk's office may, by order of the mayor, be kept open on Saturdays during the month of January.