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:
| Date | City | Opponent | Results¹ | Type of game |
| --- | --- | --- | --- | --- |
| March 18 | Sofia , Bulgaria | Bulgaria | 1:0 | Friendly |
| April 1 | Niš | Bulgaria | 1:0 | Friendly |
| May 17 | Prague , Czechoslovakia | Czechoslovakia | 3:2 | Friendly |
| June 17 | Belgrade | Romania | 1:2 | Friendly |
| September 20 | Belgrade | Luxembourg | 3:1 | 1966 WCQ |
| September 27 | Vienna , Austria | Austria | 2:3 | 1966 WCQ |
| October 13 | Tokyo, Japan | Morocco | 3:1 | 1964 Summer Olympics |
| October 15 | Tokyo, Japan | Hungary | 5:6 | 1964 Summer Olympics |
| October 18 | Tokyo, Japan | East Germany | 0:1 | 1964 Summer Olympics |
| October 20 | Osaka , Japan | Japan | 6:1 | 1964 Summer Olympics |
| October 22 | Osaka , Japan | Romania | 0:3 | 1964 Summer Olympics |
| October 25 | Budapest , Hungary | Hungary | 1:2 | Friendly |
| October 28 | Tel Aviv , Israel | Israel | 0:2 | Friendly |
| November 22 | Belgrade | USSR | 1:1 | Friendly |
Question:
What day were the results 3:2?
Answer:
May 17