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Python Datetime & Timestamp Formatting
Working with dates, times, timezones, timedeltas, and strftime formatting in Python.
📋 Copy Python Aware Datetime & ISO 8601 Snippet
from datetime import datetime, timezone, timedelta
# Modern Aware UTC Timestamp (Python 3.11+)
now_utc = datetime.now(timezone.utc)
# ISO 8601 String Formatting
iso_stamp = now_utc.isoformat()
# Date Arithmetic
two_weeks_hence = now_utc + timedelta(days=14)
# Parsing Strings with strptime
parsed = datetime.strptime("2026-09-06 12:00:00", "%Y-%m-%d %H:%M:%S").replace(tzinfo=timezone.utc)Interactive Sandbox & Core Concepts
Python is celebrated for its clean syntax, high readability, and expressive standard library. Understanding Python Datetime & Timestamp Formatting is essential for backend engineering, high-throughput automation, and data pipelines.
⚠️ 5 Fatal Traps & Python Pitfalls
Trap #1: Comparing Naive and Aware Datetime Objects
Attempting to compare or subtract a timezone-naive datetime with a timezone-aware datetime raises
TypeError: can't compare offset-naive and offset-aware datetimes. Always use aware datetimes.Trap #2: Using Deprecated datetime.utcnow()
In Python 3.12+,
datetime.utcnow() is officially deprecated because it returns a naive datetime that easily causes timezone conversion bugs. Always use datetime.now(timezone.utc).Trap #3: Daylight Saving Time Arithmetic Drift
Adding
timedelta(days=1) across a Daylight Saving Time boundary can offset the hour. For calendar-aware local times across transitions, use the modern zoneinfo.ZoneInfo module.Trap #4: strptime vs. strftime Mnemonic Confusion
strptime stands for 'parse time' (converts string to datetime object). strftime stands for 'format time' (converts datetime object to formatted string).Trap #5: Calling .timestamp() on Naive Datetimes
Calling
.timestamp() on a naive datetime assumes it represents local system time, which produces incorrect UTC epoch timestamps when run on servers in different timezones.💬 Frequently Asked Questions
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