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:
| Team | Outgoing manager | Manner of departure | Date of vacancy | Position in table | Replaced by | Date of appointment |
| --- | --- | --- | --- | --- | --- | --- |
| Haladás | László Dajka | Sacked | 17 September 1998 | 16th | István Mihalecz | 17 September 1998 |
| Videoton | Ferenc Csongrádi | Mutual agreement | 16 October 1998 | 14th | József Verebes | 16 October 1998 |
| Debrecen | András Herczeg | Sacked | 20 October 1998 | 13th | Lajos Garamvölgyi | 20 October 1998 |
| Ferencváros | Tibor Nyilasi | Mutual agreement | 17 December 1998 | 7th | Marijan Vlak | 29 December 1998 |
| III. Kerület | Ralf Wilhelms | Mutual agreement | 18 December 1998 | 16th | Lajos Schróth | 12 February 1999 |
| BVSC | István Sándor | Sacked | 22 December 1998 | 18th | Dragan Seklulić | 3 January 1999 |
| Diósgyőr | Barnabás Tornyi | Resigned | 5 January 1999 | 3rd | Gábor Szapor | 7 January 1999 |
| BVSC | Dragan Seklulić | Sacked | 10 February 1999 | 18th | József Tajti | 10 February 1999 |
| Diósgyőr | Gábor Szapor | Sacked | 14 April 1999 | 7rd[ clarification needed ] | Miklós Temesvári | 14 April 1999 |
| Siófok | László Nagy | Resigned | 4 May 1999 | 16th | József Mészáros | 4 May 1999 |
| Dunaújváros | Zoltán Varga | Resigned | 12 May 1999 | 6th | Ferenc Ebedli | 12 May 1999 |
Question:
When was outgoing manager Zoltán Varga appointed?
Answer:
12 May 1999