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A Day Has Only 24±1 Hours

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A Day Has Only 24±1 Hours
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One Europe, 63 time zones to take care of.
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118
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CC Attribution - NonCommercial - ShareAlike 3.0 Unported:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor and the work or content is shared also in adapted form only under the conditions of this
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Abstract
On the last Sunday of October you may get “one more hour of sleep” but as well may spend much more time debugging code dealing with the time zones, daylight saving time shifts and datetime stuff in general. We'll look at a few pitfalls you may encounter when working with datetimes in Python. We'll dissect the pytz library, explain why it contains over 500 individual time zones while focusing on the 63 entries in Europe. We'll also find the reason why pytz is not part of the standard Python, why it gets updated so often and why even that won't solve all your problems. Do you know what happens after 2021 when the EU stops DST switching? Two centuries of short-sighted propaganda and long-term chaos in forty-five minutes. Maybe that will make you want to avoid time zones in your code altogether!
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