Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
1957 Giro d'Italia
Table title:
Route and stages
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Stage </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Course </th><th colspan=1 rowspan=1 > Distance </th><th colspan=2 rowspan=1 > Type </th><th colspan=1 rowspan=1 > Winner </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td class="highlighted"  colspan=1 rowspan=1 > 18 May </td><td class="highlighted"  colspan=1 rowspan=1 > Milan to Verona </td><td class="highlighted"  colspan=1 rowspan=1 > 191 km (119 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Rik Van Steenbergen (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td colspan=1 rowspan=1 > 19 May </td><td colspan=1 rowspan=1 > Verona to Bosco Chiesanuova </td><td colspan=1 rowspan=1 > 28 km (17 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Individual time trial </td><td colspan=1 rowspan=1 > Charly Gaul (LUX) </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > 20 May </td><td colspan=1 rowspan=1 > Verona to Ferrara </td><td colspan=1 rowspan=1 > 169 km (105 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Miguel Poblet (ESP) </td></tr>
<tr> <th colspan=1 rowspan=1 > 4 </th><td colspan=1 rowspan=1 > 21 May </td><td colspan=1 rowspan=1 > Ferrara to Cattolica </td><td colspan=1 rowspan=1 > 190 km (118 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > André Vlayen (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 > 5 </th><td colspan=1 rowspan=1 > 22 May </td><td colspan=1 rowspan=1 > Cattolica to Loreto </td><td colspan=1 rowspan=1 > 235 km (146 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Alessandro Fantini (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 6 </th><td colspan=1 rowspan=1 > 23 May </td><td colspan=1 rowspan=1 > Loreto to Terni </td><td colspan=1 rowspan=1 > 175 km (109 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Wout Wagtmans (NED) </td></tr>
<tr> <th colspan=1 rowspan=1 > 7 </th><td colspan=1 rowspan=1 > 24 May </td><td colspan=1 rowspan=1 > Terni to Pescara </td><td colspan=1 rowspan=1 > 221 km (137 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Antonin Rolland (FRA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 8 </th><td colspan=1 rowspan=1 > 25 May </td><td colspan=1 rowspan=1 > Pescara to Naples </td><td colspan=1 rowspan=1 > 250 km (155 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Vito Favero (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 9 </th><td colspan=1 rowspan=1 > 26 May </td><td colspan=1 rowspan=1 > Naples to Frascati </td><td colspan=1 rowspan=1 > 220 km (137 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Miguel Poblet (ESP) </td></tr>
<tr> <th colspan=1 rowspan=1 > 10 </th><td colspan=1 rowspan=1 > 27 May </td><td colspan=1 rowspan=1 > Rome to Siena </td><td colspan=1 rowspan=1 > 227 km (141 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Miguel Poblet (ESP) </td></tr>
<tr> <th colspan=1 rowspan=1 > 11 </th><td colspan=1 rowspan=1 > 28 May </td><td colspan=1 rowspan=1 > Siena to Montecatini Terme </td><td colspan=1 rowspan=1 > 230 km (143 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Rik Van Steenbergen (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 >  </th><td colspan=1 rowspan=1 > 29 May </td><td colspan=6 rowspan=1 > Rest day </td></tr>
<tr> <th colspan=1 rowspan=1 > 12 </th><td colspan=1 rowspan=1 > 30 May </td><td colspan=1 rowspan=1 > Montecatini to Forte dei Marmi </td><td colspan=1 rowspan=1 > 58 km (36 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Individual time trial </td><td colspan=1 rowspan=1 > Ercole Baldini (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 13 </th><td colspan=1 rowspan=1 > 31 May </td><td colspan=1 rowspan=1 > Forte dei Marmi to Genoa </td><td colspan=1 rowspan=1 > 163 km (101 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Bruno Monti (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 14 </th><td colspan=1 rowspan=1 > 1 June </td><td colspan=1 rowspan=1 > Genoa to Saint-Vincent </td><td colspan=1 rowspan=1 > 235 km (146 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Mario Baroni (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 15 </th><td colspan=1 rowspan=1 > 2 June </td><td colspan=1 rowspan=1 > Saint-Vincent to Sion (Switzerland) </td><td colspan=1 rowspan=1 > 134 km (83 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Louison Bobet (FRA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 16 </th><td colspan=1 rowspan=1 > 3 June </td><td colspan=1 rowspan=1 > Sion (Switzerland) to Campo dei Fiori </td><td colspan=1 rowspan=1 > 229 km (142 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Alfredo Sabbadin (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 17a </th><td colspan=1 rowspan=2 > 4 June </td><td colspan=1 rowspan=1 > Varese to Como </td><td colspan=1 rowspan=1 > 82 km (51 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Alessandro Fantini (ITA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 17b </th><td colspan=1 rowspan=1 > Como to Como </td><td colspan=1 rowspan=1 > 34 km (21 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Rik Van Steenbergen (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 >  </th><td colspan=1 rowspan=1 > 5 June </td><td colspan=6 rowspan=1 > Rest day </td></tr>
<tr> <th colspan=1 rowspan=1 > 18 </th><td colspan=1 rowspan=1 > 6 June </td><td colspan=1 rowspan=1 > Como to Monte Bondone </td><td colspan=1 rowspan=1 > 242 km (150 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Miguel Poblet (ESP) </td></tr>
<tr> <th colspan=1 rowspan=1 > 19 </th><td colspan=1 rowspan=1 > 7 June </td><td colspan=1 rowspan=1 > Trento to Levico Terme </td><td colspan=1 rowspan=1 > 199 km (124 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Stage with mountain(s) </td><td colspan=1 rowspan=1 > Charly Gaul (LUX) </td></tr>
<tr> <th colspan=1 rowspan=1 > 20 </th><td colspan=1 rowspan=1 > 8 June </td><td colspan=1 rowspan=1 > Levico Terme to Abano Terme </td><td colspan=1 rowspan=1 > 157 km (98 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Rik Van Steenbergen (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 > 21 </th><td class="highlighted"  colspan=1 rowspan=1 > 9 June </td><td class="highlighted"  colspan=1 rowspan=1 > Abano Terme to Milan </td><td class="highlighted"  colspan=1 rowspan=1 > 257 km (160 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Plain stage </td><td colspan=1 rowspan=1 > Rik Van Steenbergen (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 >  </th><td colspan=2 rowspan=1 > Total </td><td colspan=5 rowspan=1 > 3,926.7 km (2,440 mi) </td></tr>
</table>
Question:
What dates were the 1957 Giro d'Italia on?
Answer:
The 1957 Giro d'Italia started in Milan, on 18 May, with a 191 km stage and concluded in Milan, on 9 June, with a 257 km leg.