每两天为事件管理器小日历着色

Question

我想在此日历上每两天创建一个不同的颜色背景。表示：

• A-SHIFT
• B-SHIFT
• C-SHIFT

目前，如果我将style="background-color:red"添加到<td>标记，则会为整个日历添加颜色。

<?php 

?>
<table class="em-calendar">
	<thead>
		<tr>
			<td><a class="em-calnav em-calnav-prev" href="<?php echo $calendar['links']['previous_url']; ?>" rel="nofollow">&lt;&lt;</a></td>
			<td class="month_name" colspan="5"><?php echo ucfirst(date_i18n(get_option('dbem_small_calendar_month_format'), $calendar['month_start'])); ?></td>
			<td><a class="em-calnav em-calnav-next" href="<?php echo $calendar['links']['next_url']; ?>" rel="nofollow">&gt;&gt;</a></td>
		</tr>
	</thead>
	<tbody>
		<tr class="days-names" style="background-color:#AD1010">
			<td><?php echo implode('</td><td>',$calendar['row_headers']); ?></td>
            
		</tr>
		<tr>
			<?php
			$cal_count = count($calendar['cells']);
			$col_count = $count = 1; //this counts collumns in the $calendar_array['cells'] array
			$col_max = count($calendar['row_headers']); //each time this collumn number is reached, we create a new collumn, the number of cells should divide evenly by the number of row_headers
			foreach($calendar['cells'] as $date => $cell_data ){
				$class = ( !empty($cell_data['events']) && count($cell_data['events']) > 0 ) ? 'eventful':'eventless';
				if(!empty($cell_data['type'])){
					$class .= "-".$cell_data['type']; 
				}
				?>
      
			
      <td class="<?php echo $class; ?>">
      <?php if( !empty($cell_data['events']) && count($cell_data['events']) > 0 ): ?>
					<a href="<?php echo esc_url($cell_data['link']); ?>" title="<?php echo esc_attr($cell_data['link_title']); ?>"><?php echo date('j',$cell_data['date']); ?></a>
					<?php else:?>
					<?php echo date('j',$cell_data['date']); ?>
					<?php endif; ?>
      </td>
      	
      	
      	


      
      <?php
				//create a new row once we reach the end of a table collumn
				$col_count= ($col_count == $col_max ) ? 1 : $col_count+1;
				echo ($col_count == 1 && $count < $cal_count) ? '</tr><tr>':'';
				$count ++; 
			}
			?>
      
				
		</tr>
	</tbody>
</table>