Control: retitle -1 NaN -> datetime = 0 (not NaT) on arm* Control: tag -1 - fixed-upstream Control: reassign -1 python3-numpy Control: affects -1 python3-pandas Control: forwarded -1 https://github.com/numpy/numpy/issues/8325
The underlying issue is that datetime/timedelta are internally ints, and use the C float -> int conversion. This is undefined when the input is NaN, so is allowed to be whatever is most efficient on that hardware: typically -2**63 (NaT) on x86 but 0 (1970-01-01) on arm*.
