datetime format is encoded (instead of pure ASCII characters transformed into string)

Here is a reference regarding discovering encoding for strftime in Python. https://stackoverflow.com/questions/19412915/how-determine-encoding-of-datetime-strftime-in-python

Closes #194 (closed)

added 1 commit

• be75c1e1 - statistic moths were checked for invalid year

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mentioned in commit cc112137

merged