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Changes between Initial Version and Version 1 of Ticket #12617, comment 6

-              initial
+              v1
 We could //correct// such an offset of timezone with the same way of pytz:
+We could //correct// such an offset of timezone with the same way of pytz, https://github.com/stub42/pytz/blob/release_2016.10/src/pytz/tzfile.py#L116:
 {{{#!diff
 …
 +            # Avoid "ValueError: tzinfo.utcoffset() must return a whole
 +            # number of minutes" (#12617)
 +            offset = timedelta(seconds=seconds - mod + (0 if mod < 30 else 60))
++            offset = timedelta(seconds=int((seconds + 30) // 60) * 60)
 +        return offset