Daniel McDonald <danielmcdon...@ucsd.edu> added the comment:

I'd like to politely request this issue be reopened. 

We recently observed a similar, if not the same, OverflowError during 
continuous integration using Github Actions on ubuntu-latest (20.04). We can 
produce the error using pure Python without pytz.

We have been unable to replicate the error using Github Actions on 
macos-latest, Centos 7.9, Ubuntu 18.04 or OSX 11.6.1.

Specifically, the following code, which I believe is pure python, will trigger 
the overflow. We've observed this using Python 3.7 and 3.9. 

import time
print(time.mktime((2017,5,26,15,30,16,4,146,1)))

Exact error output from CI can be found at the link below: 

https://github.com/biocore/microsetta-private-api/runs/4536611219?check_suite_focus=true#step:4:117

On a passing system, we receive "1495837816.0" as output. On a failing system, 
we observe "OverflowError: mktime argument out of range". 

More detail can be found on our issue with pytz and stub42 who helped guide a 
more definitive example of the bug showing it could be pure Python. That issue 
can be found here:

https://github.com/stub42/pytz/issues/66

Last, I apologize in advance if any detail is missing here or if this is not 
formatted as well as it should be. This is my first bug report with Python and 
am unfamiliar with the norms. Please let me know if further information may be 
helpful.

----------
nosy: +wasade
versions: +Python 3.7, Python 3.9

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