If you do not comply with your contractual obligations after that date, the other parties can now sue you for breach of contract. It is important to respect the treaty`s effective date, as you need to know when your commitments begin. To understand the difference between signing a contract and entering into force a contract, there are two important concepts: the validity date and the date of execution. The validity date can be used to indicate a date in the future. This is often used in employment contracts that link the validity date to the date the employee starts working. But as Ken Adams said, “I am not misleading to ensure that the effectiveness of the agreement is linked to the date the employee will take office, because the agreement will be effective once the parties have signed it.” While this may not necessarily be the case – an agreement may defer the rights and obligations of the parties to a future – it may not be in the interest of the parties to an employment contract to defer all rights and obligations, but rather to determine the duration of the employment and to determine the duration of the benefit and payment. Trade agreements and transactions are documented with validity data, i.e. the periods at which contractual commitments begin after the contract. These contracts may take the form of employment contracts, loans or loans or commercial transactions. With respect to the actual “date,” the parties will decide whether the contract should officially begin on the day of signing, on a date already completed (retrodatation) or at a later date.