Many days are left until a date with "Carbon" expires

$created_at = Carbon::parse('2020-05-05');

$numberOfDays = now()->diffInDays($created_at);

// or

$numberOfDays = now()->diffInDays($created_at, false);

The 2nd parameter again is optional and indicates if you want the return value to be the absolute value or a relative value that might have a - (negative) sign if the passed in date is less than the current instance. This will default to true, return the absolute value.

Docs: https://carbon.nesbot.com/docs/#api-difference