What potential pitfalls should be considered when using date functions in PHP to generate a weekly schedule?

When using date functions in PHP to generate a weekly schedule, a potential pitfall to consider is ensuring that the timezone is set correctly to avoid discrepancies in date and time calculations. To solve this issue, always explicitly set the timezone using `date_default_timezone_set()` to ensure consistent results across different servers and environments.

// Set the timezone to avoid discrepancies in date and time calculations
date_default_timezone_set('America/New_York');

// Use date functions to generate a weekly schedule
// Example code to generate a weekly schedule
$start_date = strtotime('next Monday');
for ($i = 0; $i < 7; $i++) {
    echo date('Y-m-d', $start_date + ($i * 86400)) . "\n";
}