I've found one way to turn a TIME! in Rebol into a number of days: add it to a date and then subtract that same date.
>> dummy-date: 12-Dec-2012
== 12-Dec-2012
>> (dummy-date + 44835:11:58) - dummy-date
== 1868
That's...rather awkward. Is there a better way built-in?
>> pick 44835:11:58 / 24 1
== 1868
or short
first 44835:11:58 / 24