I have a DateInterval
object that might begin in the InfinitePast
and I want to test to see if this is the case. When you construct such a DateInterval
it will have it's granularity updated to match the smallest granularity of the other end point. So for example DateInterval[{InfinitePast,Today}]["Min"]
will give a DateObject
with a year of -Infinity
but it will also have day and month fields and a Day level granularity.
I first tried using DateOverlapsQ
but that didn't work.
I also tried extracting the Year value to test to see if it's -Infinity
but it seems to give an error (it used to work in 12.1, now under 12.2 it seems like it tests to see that the Year is an integer.)
I also tried to manually change the granularity of infinite past to match the interval granularity, but it seems like this doesn't work as, for example, DateObject[InfinitePast,"Day"]
just keeps the same granularity of Eternity. This suggests that the granularity change on InfinitePast
in the Min of the DateInterval
is perhaps a bug? Maybe it should just return the regular InifnitePast
DateObject
, and then I could easily test it using regular equality.