CurrentDateTime() plus X hours

I have a bookings table with Start and End date/time values
For start date/time I have set the Add Page default Value to CurrentDateTime()
For the end date/time Add Page default Value, Can I use something like (CurrentDateTime()+60) to add 60 minutes to that value?

You may use the PHP function strtotime() to create a time and then use the date() function to format the date to your project’s format, see:
https://www.php.net/manual/en/function.strtotime.php
https://www.php.net/manual/en/function.date.php