datetime.datetime.isoformat()
datetime.datetime.isoformat() is a Python method in the Datetime Module category. Returns a string in ISO 8601 format (YYYY-MM-DDTHH:MM:SS). The syntax is datetime.datetime.isoformat(sep="T"). Parameters: sep — separator between date and time. Returns: String. A typical example: datetime.now().isoformat() # "2026-06-06T14:30:00". A close sibling is datetime.date(), which creates a date object representing a specific date (year, month, day). A close sibling is datetime.date.today(), which returns the current local date. A close sibling is datetime.datetime.now(), which returns the current local date and time with optional timezone. A close sibling is datetime.datetime.utcnow(), which returns the current UTC date and time (deprecated, use now(timezone.utc)). More about this category: Date and time handling — date, datetime, timedelta, timezone. For a broader walkthrough, read the Datetime Module guide. Related Datetime Module entries: datetime.date(), datetime.date.today(), datetime.datetime.now(), datetime.datetime.utcnow(), datetime.datetime.fromtimestamp(), datetime.datetime.strptime(). This page is part of the free Python Reference documentation covering 978+ functions, methods, and modules with examples and parameter details.