Working with Date and Time in PHP

I am working with a weather api just like Dark Sky that saves hourly and daily weather data into my database and i am trying to format the date and time.

I have this in my code

$weather_plot = [];
foreach ($weather_data as $day => $day_data) {
					if ($day_data) {
						foreach ($day_data as $hour => $data) {
							if ($data) {
				
								// Calculate day and hour
								$formatted_day = date('d/m', strtotime($data->date));
								$formatted_hour = str_pad($hour % 24, 2, '0', STR_PAD_LEFT);

								// var_dump($data->date);
				
								// Construct timestamp
								$timestamp = strtotime($data->date . ' +' . $hour  . ' hours') * 1000;
								$weather_plot[] = [$timestamp, $data->temperature];
			
				
								if ($min_temp === null || $max_temp === null) {
									$min_temp = $max_temp = $data->temperature;
								} else {
									$min_temp = min($min_temp, $data->temperature);
									$max_temp = max($max_temp, $data->temperature);
								}
							}
						}
					}
				}

When i var_dump($data); i get this example data

 public 'building_id' => int 124
  public 'date' => string '2023-05-23' (length=10)
  public 'hour_of_day' => int 0
  public 'summary' => string 'Cloudy' (length=6)
  public 'icon' => string 'cloudy' (length=6)
  public 'precipIntensity' => float 0
  public 'precipProbability' => float 0
  public 'temperature' => float 8.74
  public 'apparentTemperature' => float 7.35
  public 'dewPoint' => float 7.37
  public 'humidity' => float 0.91
  public 'windSpeed' => float 2.45
  public 'windBearing' => float 0.82
  public 'visibility' => float 16.09
  public 'cloudCover' => float 1
  public 'pressure' => float 1007.93
  public 'ozone' => float 354.72

and the hour_of_day goes from 0 to 47. Also the date is 2023-05-23 which is usually the previous date from current date.

My Question now is that how do i format the date to me d/m for each hour and also get the time in 2hrs interval like 00:00, 02:00, 04:00, 06:00, 08:00, 10:00, 12:00, 14:00, 16:00, 18:00, 20:00 and 22:00