datetime.md

datetime Module Class Reference

This table summarizes the core classes, their attributes, and common methods within the Python datetime module.

Class	Attributes	Common Methods	Description
date	year, month, day	today(), fromtimestamp(), fromordinal(), isoformat(), ctime(), weekday(), isoweekday(), replace(), timetuple()	Represents a calendar date (year, month, day).
time	hour, minute, second, microsecond, tzinfo, fold	isoformat(), replace(), strftime(format)	Represents a time of day independent of any particular day.
datetime	Inherits from date, adds hour, minute, second, microsecond, tzinfo	now(tz=None), utcnow(), fromtimestamp(), fromordinal(), combine(date, time), strftime(format), strptime(date_string, format), replace(), isoformat(), timestamp(), timetuple()	Combines date and time into a single object.
timedelta	days, seconds, microseconds	Supports arithmetic: +, -, *, //, abs(), total_seconds()	Represents a duration, difference between two dates or times.
tzinfo	Abstract base class; no direct attributes	utcoffset(dt), dst(dt), tzname(dt), fromutc(dt)	Base class for dealing with time zones.
timezone	utcoffset, tzname, dst	fromutc(dt), utcoffset(dt), tzname(dt), dst(dt)	Implements fixed offset time zones derived from tzinfo.
datetime.MINYEAR	Constant = 1	N/A	Smallest year allowed in date or datetime.
datetime.MAXYEAR	Constant = 9999	N/A	Largest year allowed in date or datetime.

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Common strftime Formatting Codes

Code	Meaning
%Y	Year with century (e.g., 2025)
%m	Month as zero-padded decimal (01-12)
%d	Day of the month (01-31)
%H	Hour (00-23)
%M	Minute (00-59)
%S	Second (00-59)
%I	Hour (12-hour clock, 01–12)
%H	Hour (24-hour clock, 00–23)
%M	Minute (00–59)
%S	Second (00–59)
%p	AM or PM (Locale's equivalent)

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datetime.now() Attributes and Methods

⚙️ Core Attributes and Methods of the datetime Object

This table details the common attributes and methods available on a datetime object (often referenced here as now).

Attribute / Method	Type / Return	Description
now.year	int	Year (e.g., 2025)
now.month	int	Month (1–12)
now.day	int	Day of the month (1–31)
now.hour	int	Hour of the day (0–23)
now.minute	int	Minute of the hour (0–59)
now.second	int	Second of the minute (0–59)
now.microsecond	int	Microsecond of the second (0–999999)
now.tzinfo	tzinfo or None	Timezone info (None if naive datetime)
now.fold	int (0 or 1)	Helps disambiguate during DST transitions (Python 3.6+)
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now.date()	date object	Returns the date part of the datetime
now.time()	time object	Returns the time part of the datetime
now.timetz()	time object	Returns the time with tzinfo
now.replace(**kwargs)	datetime object	Return a new datetime with replaced components
now.timetuple()	time.struct_time	Returns a struct_time tuple for use with time module
now.utctimetuple()	time.struct_time	Returns UTC struct_time
now.toordinal()	int	Returns the proleptic Gregorian ordinal (days since 1 Jan 1)
now.timestamp()	float	Returns POSIX timestamp (seconds since epoch)
now.weekday()	int	Day of the week (Monday = 0 … Sunday = 6)
now.isoweekday()	int	Day of the week (Monday = 1 … Sunday = 7)
now.isoformat()	str	Returns ISO 8601 formatted string (YYYY-MM-DDTHH:MM:SS.mmmmmm)
now.ctime()	str	Returns a string like Tue Dec 2 20:45:00 2025
now.strftime(format)	str	Format datetime as string according to format codes
now.strptime(date_string, format)	datetime object	Parse string to datetime (class method)
now.astimezone(tz=None)	datetime object	Convert to given timezone; if tz=None, convert to local timezone
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datetime.fromtimestamp(timestamp, tz=None)	datetime object	Class method: create datetime from POSIX timestamp
datetime.utcnow()	datetime object	Class method: current UTC datetime (naive)
datetime.now(tz=None)	datetime object	Class method: current local datetime, optionally with tzinfo

import datetime as dt

# First get the `now` class and then you can get the year, month etc
now = dt.datetime.now()
year = now.year
month = now.month
day = now.day

print(day)


date_of_birth = dt.datetime(year=1990, month=1, day=5)
print(date_of_birth)
# 1990-01-05 00:00:00