Getting random date between two dates

Use random_int():

 use Carbon\Carbon;

 $upTo55MinsAgo = Carbon::now()->subMinutes(random_int(0, 55));

(PHP 7, PHP 8) random_int — Generates cryptographically secure pseudo-random integers

You can also use rand(), but I think it's good practice to use the cryptographically secure function.

Use rand():

 $random = Carbon::now()->subMinutes(rand(1, 55));

To get a random date in the last year:

$random = Carbon::today()->subDays(rand(0, 365));