datetime.datetime() / datetime.date() / datetime.time()

from datetime import datetime, date, time

# Creates a datetime object.
dt = datetime(year, month, day, hour, minute, second)

# Creates a date object.
d = date(year, month, day)

# Creates a time object.
t = time(hour, minute, second)

# Gets the current date and time.
now = datetime.now()

# Gets today's date.
today = date.today()

from datetime import datetime, date, time

# Gets the current date and time.
now = datetime.now()
print(now)  # Example output: '2025-04-15 14:30:00.123456'

# Gets today's date only.
today = date.today()
print(today)  # Example output: '2025-04-15'

# Creates a datetime object for a specific date and time.
dt = datetime(2025, 4, 15, 9, 30, 0)
print(dt)  # Output: '2025-04-15 09:30:00'

# Creates a date object.
d = date(2025, 12, 31)
print(d)          # Output: '2025-12-31'
print(d.year)     # Output: '2025'
print(d.month)    # Output: '12'
print(d.day)      # Output: '31'

# Creates a time object.
t = time(23, 59, 59)
print(t)  # Output: '23:59:59'

# Accesses individual attributes of a datetime object.
dt2 = datetime.now()
print(dt2.year)      # Gets the year.
print(dt2.month)     # Gets the month.
print(dt2.weekday()) # Gets the day of the week (0=Monday to 6=Sunday).

# Creates a datetime from an ISO format string.
dt3 = datetime.fromisoformat('2025-04-15T09:30:00')
print(dt3)  # Output: '2025-04-15 09:30:00'

# Converts a datetime to a date.
d2 = datetime.now().date()
print(type(d2))  # Output: '<class 'datetime.date'>'

Python's datetime module contains several classes. datetime.datetime holds both a date and a time, datetime.date holds only a date, and datetime.time holds only a time. Writing from datetime import datetime can be confusing because the class name matches the module name, but this is the conventional way to import it.

When getting the current time, the value returned by datetime.now() depends on the server's timezone setting. If you need to handle timezones explicitly, use the standard zoneinfo module (Python 3.9+) or the pytz library for earlier versions.

For formatting and parsing datetime strings, see datetime.strftime() / datetime.strptime(). For calculating time intervals, see datetime.timedelta().