Signing (noun)

1. The act of putting one's signature to a document.
2. An occasion at which a contract or other document is signed.

Origin:

Early 16th century (in the sense "affixing a signature"): from sign + -ing.

Examples:

1. The signing of the treaty marked the end of the war.
2. The signing ceremony was attended by dignitaries from both countries.
3. The signing of the lease signaled the start of a new era.
4. The signing of the contract was a historic moment.
5. The signing of the agreement was a major breakthrough.