Legal analysis: the date of a contract generally refers to the date when the contract comes into effect or terminates. The parties may stipulate the validity period of the contract, so the calculation of the date of the contract depends on the agreement of the parties. If there is no agreed term of validity, a legally established contract shall come into effect upon its establishment according to the laws of our country, except for the formalities of examination and approval and registration in accordance with laws and administrative regulations. The term of a contract that must be registered in accordance with laws and regulations shall be counted from the time of completion of registration. Therefore, a contract generally takes effect when it is established, and the effective date of the contract is counted. The termination date of the contract is the same as the effective date. First, it can be agreed by both parties to the contract, and the rights and obligations of the contract shall terminate upon the expiration of the agreed period. It is worth mentioning that a contract that comes into effect with conditions shall be established at the time of signing, and shall not come into effect until the conditions for entry into force are met, and the contract term shall be counted. When the conditions for invalidity of the contract are met, the rights and obligations of the contract are terminated. For a contract with a term, the contract comes into effect when the term of validity comes, and automatically terminates when the term of invalidity comes.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 471 The parties may conclude a contract by offer, acceptance or other means.

Article 483 A contract is formed when an acceptance becomes effective, unless otherwise provided by law or agreed by the parties.

Article 490 Where the parties conclude a contract in the form of a contract, the contract is formed when the parties sign, seal or fingerprint it. Before signing, sealing or fingerprinting, one party has fulfilled its main obligations, and the contract is established when the other party accepts it.