Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Colony | Liberation | de facto transfer | Treaty of Cession | de jure transfer | Merger |
| --- | --- | --- | --- | --- | --- |
| Pondichéry | – | 1 November 1954 | 28 May 1956 | 16 August 1963 | 1 July 1963 |
| Chandernagore | – | 26 June 1949 | 28 February 1951 | 9 June 1952 | 1 October 1954 |
| Karikal | – | 1 November 1954 | 28 May 1956 | 16 August 1963 | 1 July 1963 |
| Mahé | 16 June 1954 | 1 November 1954 | 28 May 1956 | 16 August 1963 | 1 July 1963 |
| Yanaon | 13 June 1954 | 1 November 1954 | 28 May 1956 | 16 August 1963 | 1 July 1963 |
Question:
When was the Treaty of Cession for Karikal Colony?
Answer:
28 May 1956