Legal age for marriage: In China, the Civil Code stipulates that men should not be earlier than 22 years old and women should not be earlier than 20 years old before they can legally get married. This means that, for whatever reason, the man can't get married before the age of 22, and the woman can't register with others before the age of 20. In addition, the law clearly States that marriage must be completely voluntary by both men and women, and no form of coercion or interference is allowed.

1. Custom: Different areas may have different wedding customs. For example, some places may prefer to hold a wedding at a certain date and time, which is usually considered as an auspicious day and time. For example, in some places, weddings may be arranged at a specific time at noon or evening to conform to local traditions or superstitions.

2. Personal wishes and plans: In addition to legal provisions and regional customs, individuals can decide when to get married according to their own wishes and plans. Some people may feel pressure to get married after reaching a certain age, while others may choose a later time. In addition, with the development of society and the change of personal concept, the average marriage age of modern people is also rising.

To sum up, there is no fixed standard for the time of marriage, which is influenced by many factors. Everyone has the right to decide when to get married according to his own situation and wishes, as long as it conforms to the legal provisions and social customs.