How to fix Incorrect datetime conversion, which results in an off-by-one-hou... in Python

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We're excited to share with you our newest video, "How to solve Incorrect datetime conversion, which results in an off-by-one-hour error or incorrect UTC timestamp when converting a naive date to UTC. in Python". 🎥 This series is meticulously designed to arm you with knowledge 🧠 and skills 🛠️ to overcome frequent coding challenges.

Today, we will decipher 🔎 and resolve a common error faced by Python coders: the bit hard to solve Incorrect datetime conversion, which results in an off-by-one-hour error or incorrect UTC timestamp when converting a naive date to UTC.. Here is a snapshot of the code of the video:

Troubling Scenario: ❗️

from datetime import datetime, timezone, timedelta

# Naive date (no timezone information)
naive_date = datetime(2023, 10, 1, 14, 0, 0)

# Incorrect conversion to UTC by simply assuming local time is UTC

print("Naive date:", naive_date)
print("Incorrect UTC:", incorrect_utc)
print("Should have been:", naive_date - timedelta(hours=1))

Unwanted Result: 🚫
Incorrect datetime conversion, which results in an off-by-one-hour error or incorrect UTC timestamp when converting a naive date to UTC.

Effective Resolution: ✔️

from datetime import datetime, timezone, timedelta

# Naive date (no timezone information)
naive_date = datetime(2023, 10, 1, 14, 0, 0)

# Correct conversion to UTC using local timezone assumption
local_timezone_offset = timedelta(hours=1)

print("Naive date:", naive_date)
print("Correct UTC:", correct_utc)
print("Should have been:", naive_date - timedelta(hours=1))

Desired Output: 🏁
Naive date: 2023-10-01 14:00:00
Correct UTC: 2023-10-01 13:00:00+00:00
Should have been: 2023-10-01 13:00:00

In this detailed walkthrough, we will illuminate 💡 the underlying cause of this error, and offer a comprehensive explanation: The error occurs from naively setting tzinfo to UTC. Correcting it requires subtracting the local timezone offset first, then adding the UTC timezone info. 🎯

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