1. Date picker, a date-range picker, or a time picker?
2. Should it be activated when a user clicks on input/icon?
3. Should we combine day/month/year into one input field?
4. Should the date picker contain default preselected values?
5. How do we design the navigation between months and years?
6. How will the icon change on tap/click?
7. What happens if a user clicks on the empty bar?
8. How do we communicate unavailable options?
9. Should we allow for smart date input?
10. Do we use color coding for different rates, frequency, or busyness?
11. Is a date picker the right pattern to use for date selection?
12. How do we highlight a selected date range?
13. Do we display a daily/weekly/monthly view by default?
14. Should users be able to type a date in the input field?
15. Should users only select predefined values?
16. Should the date-picker overlay appear? And if yes, when?
17. Should the date picker contain default prepopulated values?
18. Should we display availability, price, etc.?
19. Should the week run from Mon-Sun or Sun-Sat?
20. How do we avoid displaying unavailable dates or zero-results?