You can set availability for one or multiple days and set your standard weekly availability from the main availability screen.
Click the Set Standard Week button to set the hours you can usually work during the week.
To set availability for specific days, you can tap the calendar icon to the right of "Enter Date". Here you can enter a single date or a date range, choose the hours you're available, make yourself unavailable, or set the hours to match your standard week options.
To set availability for a single day, you can also tap the day on the calendar (the selected day will have an orange circle around it) then click the pencil icon to edit. You can then choose the hours you're available, apply the availability for all of that same day of the week, make yourself unavailable, or set the hours to match your standard week options.
To set availability for multiple days, long press the days on the calendar (the selected days will have orange squares around them) then click the clock icon to edit. You can then choose the hours you're available, make yourself unavailable, or set the hours to match your standard week options.