Example of how to get a user's timezone information, if you are an admin user

gistfile1.php

<?php

// specify the REST web service to interact with
$url = 'http://sugarinstance/rest/v10';

// And admin username/password
$admin_username = '<<admin username>>';
$admin_password = '<<admin password>>';

// And username you whom you want to find out thier timezone
$other_user = '<<user you want to sudo to>>'

/**
  * Authenicate and get back token
  */
$curl = curl_init($url . "/oauth2/token");
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);

// Set the POST arguments to pass to the Sugar server
$rawPOSTdata = array(
    "grant_type" => "password",
    "username" => $admin_username,
    "password" => $admin_password,
    "client_id" => "sugar",
    "client_secret" => "",
    "platform" => "base",
    );
curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($rawPOSTdata));
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json')); 

// Make the REST call, returning the result
$response = curl_exec($curl);
if (!$response) {
    die("Connection Failure.\n");
}

// Convert the result from JSON format to a PHP array
$result = json_decode($response);

curl_close($curl);

$token = $result->access_token;

/**
  * Now, let's sudo to the other whom we want to find out thier timezone
  */

// Open a curl session for making the call
$curl = curl_init($url . "/oauth2/sudo/{$other_user}");
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json',"OAuth-Token: $token")); 
curl_setopt($curl, CURLOPT_POSTFIELDS, '');

// Make the REST call, returning the result
$response = curl_exec($curl);
if (!$response) {
    die("Connection Failure.\n");
}

// Convert the result from JSON format to a PHP array
$result = json_decode($response);

curl_close($curl);

$otherUserAccessToken = $result->access_token;

/**
  * Subsequent call to get my name
  */

// Open a curl session for making the call
$curl = curl_init($url . "/me/preference/timezone");
curl_setopt($curl, CURLOPT_POST, false);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json',"OAuth-Token: $otherUserAccessToken")); 

// Make the REST call, returning the result
$response = curl_exec($curl);
if (!$response) {
    die("Connection Failure.\n");
}

// Convert the result from JSON format to a PHP array
$timezone = json_decode($response);

curl_close($curl);

echo "Timezone for {$other_user} is {$timezone}\n";