On Solo there are two ways of setting your opening hours:

Regular opening hours

If you have set days and time that you work each week you can set recurring regular opening hours. This will appear in your calendar on the same days and times each week.

For help on setting your regular opening hours check out this article: https://intercom.help/solo-bdde61de72c4/en/articles/8657763-how-do-i-set-my-regular-opening-hours-for-a-location

Custom times

If you don't have regular opening hours and prefer to add your opening hours as and when you can do so by opening custom times directly into the calendar itself.

For help with adding custom times check out this article: https://intercom.help/solo-bdde61de72c4/en/articles/8481556-how-do-i-edit-my-opening-hours-for-a-particular-day