Our main product is local excusrions. The excursions are done twice a week. Is it possible to sell vouchers for the excusrsions that are done in specific dates?

For example

Excursion A is available every Monday and Wednesday from 1 Jun 2011 till 30 Oct 2011

Is it possible to sell voucher for the Excusrsion A which will be done on Monday 6 June 2011?

Thanks for the help