setting a property value using reflection

If the code below gets a property by constructing the property name how would i set it?

say i want to set the property availabilityMonth.Day07 = 12 for e.g?

how would i do that?

im trying something like:
dayAvailability.SetValue(_availabilityMonth, 2, Reflection.BindingFlags.SetProperty)

but not getting very far?

Dim dayAvailability As Reflection.PropertyInfo = Nothing
 
 dayAvailability = _availabilityMonth.GetType.GetProperty("Day" + monthDay.ToString())

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