JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
<table class="table table-bordered table-condensed">
    <tr>
        <th class="col-sm-1">
            Понедельник
        </th>
        <th class="col-sm-1">
            Вторник
        </th>
        <th class="col-sm-1">
            Среда
        </th>
        <th class="col-sm-1">
            Четверг
        </th>
        <th class="col-sm-1">
            Пятница
        </th>
        <th class="col-sm-1">
            Суббота
        </th>
        <th class="col-sm-1">
            Воскресенье
        </th>
    </tr>

        <tr>

<td> </td><td> </td><td> </td><td> </td><td><span class='sit-in-the-cornersecond'>1</span></td><td><span class='sit-in-the-cornersecond'>2</span></td><td><span class='sit-in-the-cornersecond'>3</span></td>
        </tr>
        <tr>

<td><span class='sit-in-the-cornersecond'>4</span></td><td><span class='sit-in-the-cornersecond'>5</span></td><td><span class='sit-in-the-cornersecond'>6</span></td><td><span class='sit-in-the-cornersecond'>7</span></td><td><span class='sit-in-the-cornersecond'>8</span></td><td><span class='sit-in-the-cornersecond'>9</span></td><td><span class='sit-in-the-cornersecond'>10</span></td>
        </tr>
        <tr>

<td><span class='sit-in-the-corner'>11</span>Текст-Текст<br/>Текст-Текст</td><td><span class='sit-in-the-corner'>12</span>Текст-Текст<br/>Текст-Текст</td><td><span class='sit-in-the-cornersecond'>13</span></td><td><span class='sit-in-the-corner'>14</span>Текст-Текст<br/>Текст-Текст</td><td><span class='sit-in-the-corner'>15</span>Текст-Текст<br/>Текст-Текст</td><td><span class='sit-in-the-cornersecond'>16</span></td><td><span class='sit-in-the-cornersecond'>17</span></td>
        </tr>
        <tr>

<td><span class='sit-in-the-cornersecond'>18</span></td><td><span class='sit-in-the-cornersecond'>19</span></td><td><span class='sit-in-the-cornersecond'>20</span></td><td><span...

CSS

table th {
    text-align: center ;
    vertical-align: middle !important;
}

table tr {
   line-height: 75px;
   min-height: 75px;
   height: 75px;
}

table td {
    vertical-align: middle !important;
    text-align: center;
}

.sit-in-the-cornersecond {
    float: left;
    margin-left: 5px;
    margin-top: -35px;
}

.sit-in-the-corner {
    float: left;
    margin-left: 5px;
    margin-top: -15px;
}