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:
Bacolod City-class logistics support vessel
Table title:
Ships in Class
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Bow number </th><th colspan=1 rowspan=1 > Ship name </th><th colspan=1 rowspan=1 > Commissioned </th><th colspan=1 rowspan=1 > Service </th><th colspan=1 rowspan=1 > Status </th></tr>
<tr> <td colspan=1 rowspan=1 > LS-550 </td><td class="highlighted"  colspan=1 rowspan=1 > BRP Bacolod City </td><td class="highlighted"  colspan=1 rowspan=1 > 1 December 1993 </td><td class="highlighted"  colspan=1 rowspan=1 > Sealift Amphibious Force </td><td colspan=1 rowspan=1 > Active </td></tr>
<tr> <td colspan=1 rowspan=1 > LS-551 </td><td class="highlighted"  colspan=1 rowspan=1 > BRP Dagupan City </td><td class="highlighted"  colspan=1 rowspan=1 > 5 April 1994 </td><td class="highlighted"  colspan=1 rowspan=1 > Sealift Amphibious Force </td><td colspan=1 rowspan=1 > Active </td></tr>
</table>
Question:
When was the BRP Bacolod City and BRP Dagupan City commissioned into the Navy?
Answer:
The first unit, BRP Bacolod City was commissioned into Navy in December 1993, while BRP Dagupan City was commissioned in April 1994.