Google Calendar API で日本の公式祝日カレンダーを取得・表示する PHP サンプル

google_calendar_official_holiday.php

<?php

$year = "2024";
$country_code = 'japanese';
$api_key = 'your API KEY';

$holidays_url = sprintf(
  'https://www.googleapis.com/calendar/v3/calendars/%s/events?'.
  'key=%s&timeMin=%s&timeMax=%s&orderBy=startTime&singleEvents=true',
  'ja.' . $country_code . '.official%23holiday@group.v.calendar.google.com',
  $api_key,
  $year . '-01-01T00%3A00%3A00.000Z',
  $year . '-12-31T00%3A00%3A00.000Z'
);

if ($results = file_get_contents($holidays_url, true)) {
  $result_data = json_decode($results);
  $holidays = [];
  foreach ($result_data->items as $item) {
    $holidays[date('Y-m-d', strtotime($item->start->date))] = $item->summary;
  }
  ksort($holidays);
}

var_dump(json_encode($holidays, true));