How can the `date()` function in PHP be properly utilized to display dates in different formats, especially when dealing with timestamps like 01.01.1970?

When dealing with timestamps like 01.01.1970 in PHP, the `date()` function can be utilized to format and display dates in different formats. To display dates in various formats, you can pass different format parameters to the `date()` function. For example, to display the date in the format "d-m-Y", you can use `date('d-m-Y', $timestamp)` where `$timestamp` is the Unix timestamp you want to format.

$timestamp = 0; // Unix timestamp for 01.01.1970
echo date('d-m-Y', $timestamp); // Output: 01-01-1970