Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/19234
Hm, BTW, do we handle
https://github.com/python/cpython/blob/018d353c1c8c87767d2335cd884017c2ce12e045/Lib/datetime.py#L1443-L1455:
```python
if tz is None:
# As of version 2015f max fold in IANA database is
# 23 hours at 1969-09-30 13:00:00 in Kwajalein.
# Let's probe 24 hours in the past to detect a transition:
max_fold_seconds = 24 * 3600
y, m, d, hh, mm, ss = converter(t - max_fold_seconds)[:6]
probe1 = cls(y, m, d, hh, mm, ss, us, tz)
trans = result - probe1 - timedelta(0, max_fold_seconds)
if trans.days < 0:
y, m, d, hh, mm, ss = converter(t + trans // timedelta(0,
1))[:6]
probe2 = cls(y, m, d, hh, mm, ss, us, tz)
if probe2 == result:
result._fold = 1
```
Or do you guys see it could be ignorable as it is quite newly fixed (in
3.6.x) and a corner case vs the improvement?
Looking at the performance improvement in the PR description, it sounds
pretty trivial. If it is safe to go, I am okay but if we miss anything, I doubt
if it is worth fixing.
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