Hours of operation of EFS-Web will be clearly provided in the EFS-Web instructions when users log on to the system. The USPTO will post information on any scheduled down time due to system maintenance in advance. Users may file patent documents electronically during the hours of operation of EFS-Web every day of the week, including weekends and holidays. If the submission is successfully received (even on a Saturday, Sunday, or Federal holiday within the District of Columbia), the USPTO will assign that receipt date to the submission.