You can select between three types of tickets when you set up your products.
Select "Availability" > "Time, date, or pass" in your chosen product and select one of the following:
Date and time is what you select if you want to add set times to your experience.
Just date, no time is what you select if you want to offer your customers some more flexibility. You will decide on time together.
Pass is what you select when there is no set date or time for the experience. This is suitable for experiences that are not too restricted to date or time, such as museum tickets.