google api calendar integration doesnt recognize am/pm

i have a google calendar integration with php, the problem that im having is that the events are getting inserted in the google calendar, however when an event is after 12m it gets inserted as am when i need it to be PM.

here is the array with the info that im sending:

  array(7) {
  ["summary"]=>
  string(12) "Cita MEDICA"
  ["location"]=>
  string(50) "MEDIA - Cra. 349b #825 - 40, Someplace, Around"
  ["description"]=>
  string(21) "Estudio existente"
  ["start"]=>
  array(2) {
    ["dateTime"]=>
    string(18) "2021-05-29T3:00:00"
    ["timeZone"]=>
    string(14) "America/Bogota"
  }
  ["end"]=>
  array(2) {
    ["dateTime"]=>
    string(19) "2021-05-29T03:30:00"
    ["timeZone"]=>
    string(14) "America/Bogota"
  }
  ["attendees"]=>
  array(1) {
    [0]=>
    array(1) {
      ["email"]=>
      string(16) "alfredo@test.co"
    }
  }
  ["reminders"]=>
  array(2) {
    ["useDefault"]=>
    bool(false)
    ["overrides"]=>
    array(2) {
      [0]=>
      array(2) {
        ["method"]=>
        string(5) "email"
        ["minutes"]=>
        int(60)
      }
      [1]=>
      array(2) {
        ["method"]=>
        string(5) "popup"
        ["minutes"]=>
        int(10)
      }
    }
  }
}

When i see the example in the google calendar site:

  'start' => array(
    'dateTime' => '2015-05-28T09:00:00-07:00',
    'timeZone' => 'America/Los_Angeles',
  ),
  'end' => array(
    'dateTime' => '2015-05-28T17:00:00-07:00',
    'timeZone' => 'America/Los_Angeles',
  ),

te dateTime format is different, i dont understand why -> 17:00:00-07:00 seems to have two parameters.

can someone explain it to me? thanks!

source https://stackoverflow.com/questions/67862981/google-api-calendar-integration-doesnt-recognize-am-pm