According to regulations, some marriage registration offices in certain regions have implemented normal marriage registration on Saturdays (excluding statutory holidays). In addition, on special occasions such as New Year's Day, Chinese New Year's Eve, Valentine's Day, May Day, and National Day, marriage registration is processed as usual. So, there are people working at the Civil Affairs Bureau from Monday to Saturday. But regulations may vary in different regions, it is recommended to go directly to the local marriage registration agency for confirmation.
In some areas, the Civil Affairs Bureau provides appointment registration services on Saturdays and does not handle business on Sundays. But the prerequisite is that an appointment has been made online at the marriage registration office in advance, and only marriages that have been booked will be processed on Saturdays.
The Civil Affairs Bureau is an administrative agency in China and also requires daily leave. The general working hours of civil affairs bureaus in various regions are: Monday to Friday morning: 8:30-11:30, afternoon: 13:30-17:00. The office hours may vary in different places and regions, and there are distinctions between winter time and summer time.